21427883886 has 32 divisors (see below), whose sum is σ = 45398160288. Its totient is φ = 6719293440.

The previous prime is 21427883837. The next prime is 21427883899. The reversal of 21427883886 is 68838872412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171816 + ... + 269028.

It is an arithmetic number, because the mean of its divisors is an integer number (1418692509).

Almost surely, 2^21427883886 is an apocalyptic number.

21427883886 is an abundant number, since it is smaller than the sum of its proper divisors (23970276402).

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

21427883886 is a wasteful number, since it uses less digits than its factorization.

21427883886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99396.

The product of its digits is 8257536, while the sum is 57.

The spelling of 21427883886 in words is "twenty-one billion, four hundred twenty-seven million, eight hundred eighty-three thousand, eight hundred eighty-six".