21395558930 has 16 divisors (see below), whose sum is σ = 40777418520. Its totient is φ = 8054798592.

The previous prime is 21395558929. The next prime is 21395558959. The reversal of 21395558930 is 3985559312.

It can be written as a sum of positive squares in 4 ways, for example, as 20654576089 + 740982841 = 143717^2 + 27221^2 .

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, 62927945 + ... + 62928284.

Almost surely, 2^21395558930 is an apocalyptic number.

21395558930 is a deficient number, since it is larger than the sum of its proper divisors (19381859590).

21395558930 is a wasteful number, since it uses less digits than its factorization.

21395558930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125856253.

The product of its (nonzero) digits is 1458000, while the sum is 50.

The spelling of 21395558930 in words is "twenty-one billion, three hundred ninety-five million, five hundred fifty-eight thousand, nine hundred thirty".