22815206872 has 8 divisors (see below), whose sum is σ = 42778512900. Its totient is φ = 11407603432.

The previous prime is 22815206863. The next prime is 22815206899. The reversal of 22815206872 is 27860251822.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×22815206872² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1425950422 + ... + 1425950437.

Almost surely, 2^22815206872 is an apocalyptic number.

It is an amenable number.

22815206872 is a deficient number, since it is larger than the sum of its proper divisors (19963306028).

22815206872 is a wasteful number, since it uses less digits than its factorization.

22815206872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851900865 (or 2851900861 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 22815206872 in words is "twenty-two billion, eight hundred fifteen million, two hundred six thousand, eight hundred seventy-two".