21886738470 has 48 divisors (see below), whose sum is σ = 57200412672. Its totient is φ = 5806218240.

The previous prime is 21886738441. The next prime is 21886738477. The reversal of 21886738470 is 7483768812.

It is a happy number.

21886738470 is a `hidden beast` number, since 2 + 1 + 88 + 67 + 38 + 470 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21886738477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 612646 + ... + 647385.

It is an arithmetic number, because the mean of its divisors is an integer number (1191675264).

Almost surely, 2^21886738470 is an apocalyptic number.

21886738470 is an abundant number, since it is smaller than the sum of its proper divisors (35313674202).

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

21886738470 is a wasteful number, since it uses less digits than its factorization.

21886738470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260237 (or 1260234 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 21886738470 in words is "twenty-one billion, eight hundred eighty-six million, seven hundred thirty-eight thousand, four hundred seventy".