21594612130 has 72 divisors (see below), whose sum is σ = 48962404692. Its totient is φ = 6834312576.

The previous prime is 21594612103. The next prime is 21594612131. The reversal of 21594612130 is 3121649512.

It can be written as a sum of positive squares in 6 ways, for example, as 4844299201 + 16750312929 = 69601^2 + 129423^2 .

It is not an unprimeable number, because it can be changed into a prime (21594612131) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47577 + ... + 213196.

Almost surely, 2^21594612130 is an apocalyptic number.

21594612130 is an abundant number, since it is smaller than the sum of its proper divisors (27367792562).

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

21594612130 is a wasteful number, since it uses less digits than its factorization.

21594612130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260820 (or 260800 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 21594612130 in words is "twenty-one billion, five hundred ninety-four million, six hundred twelve thousand, one hundred thirty".