21372607258 has 16 divisors (see below), whose sum is σ = 33029269704. Its totient is φ = 10364673600.

The previous prime is 21372607237. The next prime is 21372607301. The reversal of 21372607258 is 85270627312.

It can be written as a sum of positive squares in 4 ways, for example, as 10485145609 + 10887461649 = 102397^2 + 104343^2 .

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, 432093 + ... + 479008.

Almost surely, 2^21372607258 is an apocalyptic number.

21372607258 is a deficient number, since it is larger than the sum of its proper divisors (11656662446).

21372607258 is a wasteful number, since it uses less digits than its factorization.

21372607258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911457.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 21372607258 in words is "twenty-one billion, three hundred seventy-two million, six hundred seven thousand, two hundred fifty-eight".