21957372971030 has 96 divisors (see below), whose sum is σ = 46961639192160. Its totient is φ = 7368433712640.

The previous prime is 21957372970961. The next prime is 21957372971069. The reversal of 21957372971030 is 3017927375912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2342936 + ... + 7028804.

It is an arithmetic number, because the mean of its divisors is an integer number (489183741585).

Almost surely, 2^{21957372971030} is an apocalyptic number.

It is a pronic number, being equal to 4685869×4685870.

21957372971030 is an abundant number, since it is smaller than the sum of its proper divisors (25004266221130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21957372971030 is a wasteful number, since it uses less digits than its factorization.

21957372971030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686094 (or 4686087 counting only the distinct ones).

The product of its (nonzero) digits is 5000940, while the sum is 56.

The spelling of 21957372971030 in words is "twenty-one trillion, nine hundred fifty-seven billion, three hundred seventy-two million, nine hundred seventy-one thousand, thirty".