[go: up one dir, main page]

Search a number
-
+
20566638 = 2326118731
BaseRepresentation
bin100111001110…
…1001001101110
31102200220010100
41032131021232
520231113023
62012451530
7336546021
oct116351156
942626110
1020566638
1110678024
126a79ba6
134351311
142a351b8
151c13c43
hex139d26e

20566638 has 24 divisors (see below), whose sum is σ = 45293976. Its totient is φ = 6742800.

The previous prime is 20566631. The next prime is 20566657. The reversal of 20566638 is 83666502.

It is a super-3 number, since 3×205666383 (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20566631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8268 + ... + 10463.

It is an arithmetic number, because the mean of its divisors is an integer number (1887249).

Almost surely, 220566638 is an apocalyptic number.

20566638 is an abundant number, since it is smaller than the sum of its proper divisors (24727338).

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

20566638 is a wasteful number, since it uses less digits than its factorization.

20566638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18800 (or 18797 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 20566638 is about 4535.0455345013. The cubic root of 20566638 is about 273.9814131282.

The spelling of 20566638 in words is "twenty million, five hundred sixty-six thousand, six hundred thirty-eight".

Divisors: 1 2 3 6 9 18 61 122 183 366 549 1098 18731 37462 56193 112386 168579 337158 1142591 2285182 3427773 6855546 10283319 20566638