21252575224372 has 12 divisors (see below), whose sum is σ = 37205931036736. Its totient is φ = 10622309213880.

The previous prime is 21252575224343. The next prime is 21252575224403. The reversal of 21252575224372 is 27342257525212.

It is a super-2 number, since 2×21252575224372² (a number of 27 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, 994587558 + ... + 994608925.

Almost surely, 2^{21252575224372} is an apocalyptic number.

It is an amenable number.

21252575224372 is a deficient number, since it is larger than the sum of its proper divisors (15953355812364).

21252575224372 is a wasteful number, since it uses less digits than its factorization.

21252575224372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989199158 (or 1989199156 counting only the distinct ones).

The product of its digits is 4704000, while the sum is 49.

The spelling of 21252575224372 in words is "twenty-one trillion, two hundred fifty-two billion, five hundred seventy-five million, two hundred twenty-four thousand, three hundred seventy-two".