21062204136 has 48 divisors (see below), whose sum is σ = 58434781860. Its totient is φ = 6849496320.

The previous prime is 21062204123. The next prime is 21062204147. The reversal of 21062204136 is 63140226012.

21062204136 is a `hidden beast` number, since 2 + 1 + 0 + 622 + 0 + 4 + 1 + 36 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17028684036 + 4033520100 = 130494^2 + 63510^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3564495 + ... + 3570398.

Almost surely, 2^21062204136 is an apocalyptic number.

It is an amenable number.

21062204136 is an abundant number, since it is smaller than the sum of its proper divisors (37372577724).

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

21062204136 is a wasteful number, since it uses less digits than its factorization.

21062204136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7134946 (or 7134939 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The spelling of 21062204136 in words is "twenty-one billion, sixty-two million, two hundred four thousand, one hundred thirty-six".