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20144634 = 233357439
BaseRepresentation
bin100110011011…
…0000111111010
31101220110020120
41030312013322
520124112014
61555434110
7333140466
oct114660772
941813216
1020144634
1110409a64
1268b5936
134234203
1429654a6
151b7dba9
hex13361fa

20144634 has 8 divisors (see below), whose sum is σ = 40289280. Its totient is φ = 6714876.

The previous prime is 20144633. The next prime is 20144659. The reversal of 20144634 is 43644102.

It is a sphenic number, since it is the product of 3 distinct primes.

20144634 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20144633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1678714 + ... + 1678725.

It is an arithmetic number, because the mean of its divisors is an integer number (5036160).

Almost surely, 220144634 is an apocalyptic number.

20144634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20144634 is a wasteful number, since it uses less digits than its factorization.

20144634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357444.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20144634 is about 4488.2773978443. The cubic root of 20144634 is about 272.0945191263.

Adding to 20144634 its reverse (43644102), we get a palindrome (63788736).

The spelling of 20144634 in words is "twenty million, one hundred forty-four thousand, six hundred thirty-four".

Divisors: 1 2 3 6 3357439 6714878 10072317 20144634