21951827936 has 48 divisors (see below), whose sum is σ = 44734258800. Its totient is φ = 10591193088.

The previous prime is 21951827921. The next prime is 21951827951. The reversal of 21951827936 is 63972815912.

It is an interprime number because it is at equal distance from previous prime (21951827921) and next prime (21951827951).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1830536 + ... + 1842488.

It is an arithmetic number, because the mean of its divisors is an integer number (931963725).

Almost surely, 2^21951827936 is an apocalyptic number.

It is an amenable number.

21951827936 is an abundant number, since it is smaller than the sum of its proper divisors (22782430864).

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

21951827936 is a wasteful number, since it uses less digits than its factorization.

21951827936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13971 (or 13963 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 53.

The spelling of 21951827936 in words is "twenty-one billion, nine hundred fifty-one million, eight hundred twenty-seven thousand, nine hundred thirty-six".