21036963546 has 16 divisors (see below), whose sum is σ = 46748808000. Its totient is φ = 7012321164.

The previous prime is 21036963517. The next prime is 21036963557. The reversal of 21036963546 is 64536963012.

21036963546 is a `hidden beast` number, since 2 + 1 + 0 + 3 + 6 + 9 + 635 + 4 + 6 = 666.

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, 194786646 + ... + 194786753.

It is an arithmetic number, because the mean of its divisors is an integer number (2921800500).

Almost surely, 2^21036963546 is an apocalyptic number.

21036963546 is an abundant number, since it is smaller than the sum of its proper divisors (25711844454).

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

21036963546 is a wasteful number, since it uses less digits than its factorization.

21036963546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389573410 (or 389573404 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The spelling of 21036963546 in words is "twenty-one billion, thirty-six million, nine hundred sixty-three thousand, five hundred forty-six".