21653256130 has 48 divisors (see below), whose sum is σ = 42907633272. Its totient is φ = 7861708800.

The previous prime is 21653256127. The next prime is 21653256151. The reversal of 21653256130 is 3165235612.

It can be written as a sum of positive squares in 4 ways, for example, as 19679320089 + 1973936041 = 140283^2 + 44429^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 786274 + ... + 813346.

Almost surely, 2^21653256130 is an apocalyptic number.

21653256130 is a deficient number, since it is larger than the sum of its proper divisors (21254377142).

21653256130 is a wasteful number, since it uses less digits than its factorization.

21653256130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27763 (or 27752 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 21653256130 in words is "twenty-one billion, six hundred fifty-three million, two hundred fifty-six thousand, one hundred thirty".