21650473676504 has 32 divisors (see below), whose sum is σ = 40655245831200. Its totient is φ = 10809083024640.

The previous prime is 21650473676497. The next prime is 21650473676509. The reversal of 21650473676504 is 40567637405612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21650473676504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21650473676509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20596814 + ... + 21622434.

It is an arithmetic number, because the mean of its divisors is an integer number (1270476432225).

Almost surely, 2^{21650473676504} is an apocalyptic number.

It is an amenable number.

21650473676504 is a deficient number, since it is larger than the sum of its proper divisors (19004772154696).

21650473676504 is a wasteful number, since it uses less digits than its factorization.

21650473676504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029563 (or 1029559 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 56.

The spelling of 21650473676504 in words is "twenty-one trillion, six hundred fifty billion, four hundred seventy-three million, six hundred seventy-six thousand, five hundred four".