20864360 has 32 divisors (see below), whose sum is σ = 51213600. Its totient is φ = 7586880.

The previous prime is 20864357. The next prime is 20864387. The reversal of 20864360 is 6346802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23270 + ... + 24149.

It is an arithmetic number, because the mean of its divisors is an integer number (1600425).

Almost surely, 2^20864360 is an apocalyptic number.

20864360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20864360 is an abundant number, since it is smaller than the sum of its proper divisors (30349240).

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

20864360 is a wasteful number, since it uses less digits than its factorization.

20864360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47441 (or 47437 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 20864360 is about 4567.7521824197. The cubic root of 20864360 is about 275.2971333817.

It can be divided in two parts, 2086 and 4360, that added together give a palindrome (6446).

The spelling of 20864360 in words is "twenty million, eight hundred sixty-four thousand, three hundred sixty".