21037107536 has 20 divisors (see below), whose sum is σ = 40785193152. Its totient is φ = 10511896416.

The previous prime is 21037107523. The next prime is 21037107547. The reversal of 21037107536 is 63570173012.

It is a junction number, because it is equal to n+sod(n) for n = 21037107496 and 21037107505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389966 + ... + 440621.

Almost surely, 2^21037107536 is an apocalyptic number.

It is an amenable number.

21037107536 is a deficient number, since it is larger than the sum of its proper divisors (19748085616).

21037107536 is a wasteful number, since it uses less digits than its factorization.

21037107536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832178 (or 832172 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The spelling of 21037107536 in words is "twenty-one billion, thirty-seven million, one hundred seven thousand, five hundred thirty-six".