21937555970 has 64 divisors (see below), whose sum is σ = 44045254656. Its totient is φ = 7798457280.

The previous prime is 21937555967. The next prime is 21937556023. The reversal of 21937555970 is 7955573912.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5700587 + ... + 5704433.

It is an arithmetic number, because the mean of its divisors is an integer number (688207104).

Almost surely, 2^21937555970 is an apocalyptic number.

21937555970 is an abundant number, since it is smaller than the sum of its proper divisors (22107698686).

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

21937555970 is a wasteful number, since it uses less digits than its factorization.

21937555970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015.

The product of its (nonzero) digits is 2976750, while the sum is 53.

The spelling of 21937555970 in words is "twenty-one billion, nine hundred thirty-seven million, five hundred fifty-five thousand, nine hundred seventy".