21937745370 has 64 divisors (see below), whose sum is σ = 56661659136. Its totient is φ = 5415674880.

The previous prime is 21937745321. The next prime is 21937745381. The reversal of 21937745370 is 7354773912.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321474 + ... + 383693.

It is an arithmetic number, because the mean of its divisors is an integer number (885338424).

Almost surely, 2^21937745370 is an apocalyptic number.

21937745370 is an abundant number, since it is smaller than the sum of its proper divisors (34723913766).

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

21937745370 is a wasteful number, since it uses less digits than its factorization.

21937745370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705255.

The product of its (nonzero) digits is 1111320, while the sum is 48.

The spelling of 21937745370 in words is "twenty-one billion, nine hundred thirty-seven million, seven hundred forty-five thousand, three hundred seventy".