21492596899256 has 16 divisors (see below), whose sum is σ = 46055564784240. Its totient is φ = 9211112956800.

The previous prime is 21492596899231. The next prime is 21492596899259. The reversal of 21492596899256 is 65299869529412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21492596899259) 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, 191898186545 + ... + 191898186656.

It is an arithmetic number, because the mean of its divisors is an integer number (2878472799015).

Almost surely, 2^{21492596899256} is an apocalyptic number.

It is an amenable number.

21492596899256 is an abundant number, since it is smaller than the sum of its proper divisors (24562967884984).

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

21492596899256 is a wasteful number, since it uses less digits than its factorization.

21492596899256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383796373214 (or 383796373210 counting only the distinct ones).

The product of its digits is 1511654400, while the sum is 77.

The spelling of 21492596899256 in words is "twenty-one trillion, four hundred ninety-two billion, five hundred ninety-six million, eight hundred ninety-nine thousand, two hundred fifty-six".