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20350572 = 223111511021
BaseRepresentation
bin100110110100…
…0011001101100
31102021220201220
41031220121230
520202204242
62004103340
7334656054
oct115503154
942256656
1020350572
111053a760
126994b50
1342a6b78
1429ba564
151bbebec
hex136866c

20350572 has 48 divisors (see below), whose sum is σ = 52195584. Its totient is φ = 6120000.

The previous prime is 20350559. The next prime is 20350597. The reversal of 20350572 is 27505302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19422 + ... + 20442.

It is an arithmetic number, because the mean of its divisors is an integer number (1087408).

Almost surely, 220350572 is an apocalyptic number.

20350572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20350572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26097792).

20350572 is an abundant number, since it is smaller than the sum of its proper divisors (31845012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20350572 is a wasteful number, since it uses less digits than its factorization.

20350572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1188 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20350572 is about 4511.1608262176. The cubic root of 20350572 is about 273.0185821054.

Adding to 20350572 its reverse (27505302), we get a palindrome (47855874).

The spelling of 20350572 in words is "twenty million, three hundred fifty thousand, five hundred seventy-two".

Divisors: 1 2 3 4 6 11 12 22 33 44 66 132 151 302 453 604 906 1021 1661 1812 2042 3063 3322 4084 4983 6126 6644 9966 11231 12252 19932 22462 33693 44924 67386 134772 154171 308342 462513 616684 925026 1695881 1850052 3391762 5087643 6783524 10175286 20350572