21474490928832 has 42 divisors (see below), whose sum is σ = 61552750910508. Its totient is φ = 7158163642752.

The previous prime is 21474490928809. The next prime is 21474490928833. The reversal of 21474490928832 is 23882909447412.

It is a happy number.

21474490928832 is a `hidden beast` number, since 2 + 1 + 47 + 4 + 490 + 9 + 28 + 83 + 2 = 666.

It is a super-2 number, since 2×21474490928832² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21474490928832.

It is not an unprimeable number, because it can be changed into a prime (21474490928833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18641050578 + ... + 18641051729.

Almost surely, 2^{21474490928832} is an apocalyptic number.

It is an amenable number.

21474490928832 is an abundant number, since it is smaller than the sum of its proper divisors (40078259981676).

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

21474490928832 is a wasteful number, since it uses less digits than its factorization.

21474490928832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37282102325 (or 37282102312 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 63.

The spelling of 21474490928832 in words is "twenty-one trillion, four hundred seventy-four billion, four hundred ninety million, nine hundred twenty-eight thousand, eight hundred thirty-two".