21476574406684 has 24 divisors (see below), whose sum is σ = 37880383242240. Its totient is φ = 10653609735216.

The previous prime is 21476574406649. The next prime is 21476574406741. The reversal of 21476574406684 is 48660447567412.

It is a super-2 number, since 2×21476574406684² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 56135889 + ... + 56517175.

It is an arithmetic number, because the mean of its divisors is an integer number (1578349301760).

Almost surely, 2^{21476574406684} is an apocalyptic number.

It is an amenable number.

21476574406684 is a deficient number, since it is larger than the sum of its proper divisors (16403808835556).

21476574406684 is a wasteful number, since it uses less digits than its factorization.

21476574406684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492297 (or 492295 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 64.

The spelling of 21476574406684 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred seventy-four million, four hundred six thousand, six hundred eighty-four".