22521251764 has 12 divisors (see below), whose sum is σ = 42995117088. Its totient is φ = 10236932600.

The previous prime is 22521251749. The next prime is 22521251887. The reversal of 22521251764 is 46715212522.

It is a super-2 number, since 2×22521251764² (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 in 3 ways as a sum of consecutive naturals, for example, 255923272 + ... + 255923359.

It is an arithmetic number, because the mean of its divisors is an integer number (3582926424).

Almost surely, 2^22521251764 is an apocalyptic number.

It is an amenable number.

22521251764 is a deficient number, since it is larger than the sum of its proper divisors (20473865324).

22521251764 is a wasteful number, since it uses less digits than its factorization.

22521251764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511846646 (or 511846644 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The spelling of 22521251764 in words is "twenty-two billion, five hundred twenty-one million, two hundred fifty-one thousand, seven hundred sixty-four".