21572838010 has 8 divisors (see below), whose sum is σ = 38831108436. Its totient is φ = 8629135200.

The previous prime is 21572837999. The next prime is 21572838029. The reversal of 21572838010 is 1083827512.

It can be written as a sum of positive squares in 2 ways, for example, as 17736646041 + 3836191969 = 133179^2 + 61937^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1078641891 + ... + 1078641910.

Almost surely, 2^21572838010 is an apocalyptic number.

21572838010 is a deficient number, since it is larger than the sum of its proper divisors (17258270426).

21572838010 is a wasteful number, since it uses less digits than its factorization.

21572838010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157283808.

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 21572838010 in words is "twenty-one billion, five hundred seventy-two million, eight hundred thirty-eight thousand, ten".