21893258937 has 64 divisors (see below), whose sum is σ = 34760945664. Its totient is φ = 12104432640.

The previous prime is 21893258923. The next prime is 21893258957. The reversal of 21893258937 is 73985239812.

It is a happy number.

It is not a de Polignac number, because 21893258937 - 2⁷ = 21893258809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21893258917) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5872368 + ... + 5876094.

It is an arithmetic number, because the mean of its divisors is an integer number (543139776).

Almost surely, 2^21893258937 is an apocalyptic number.

It is an amenable number.

21893258937 is a deficient number, since it is larger than the sum of its proper divisors (12867686727).

21893258937 is a wasteful number, since it uses less digits than its factorization.

21893258937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078.

The product of its digits is 6531840, while the sum is 57.

The spelling of 21893258937 in words is "twenty-one billion, eight hundred ninety-three million, two hundred fifty-eight thousand, nine hundred thirty-seven".