21050056602 has 40 divisors (see below), whose sum is σ = 47634763572. Its totient is φ = 6947208000.

The previous prime is 21050056597. The next prime is 21050056633. The reversal of 21050056602 is 20665005012.

21050056602 is a `hidden beast` number, since 2 + 1 + 0 + 5 + 0 + 0 + 56 + 602 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19613722401 + 1436334201 = 140049^2 + 37899^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 626899 + ... + 659622.

Almost surely, 2^21050056602 is an apocalyptic number.

21050056602 is an abundant number, since it is smaller than the sum of its proper divisors (26584706970).

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

21050056602 is a wasteful number, since it uses less digits than its factorization.

21050056602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286636 (or 1286627 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 21050056602 in words is "twenty-one billion, fifty million, fifty-six thousand, six hundred two".