21937250874 has 192 divisors, whose sum is σ = 60246982656. Its totient is φ = 5189184000.

The previous prime is 21937250873. The next prime is 21937250897. The reversal of 21937250874 is 47805273912.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21937250873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2674119 + ... + 2682309.

It is an arithmetic number, because the mean of its divisors is an integer number (313786368).

Almost surely, 2^21937250874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21937250874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30123491328).

21937250874 is an abundant number, since it is smaller than the sum of its proper divisors (38309731782).

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

21937250874 is a wasteful number, since it uses less digits than its factorization.

21937250874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8273 (or 8262 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 21937250874 in words is "twenty-one billion, nine hundred thirty-seven million, two hundred fifty thousand, eight hundred seventy-four".