21936039896 has 32 divisors (see below), whose sum is σ = 43569563040. Its totient is φ = 10318084608.

The previous prime is 21936039893. The next prime is 21936039967. The reversal of 21936039896 is 69893063912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21936039893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268181 + ... + 340283.

It is an arithmetic number, because the mean of its divisors is an integer number (1361548845).

Almost surely, 2^21936039896 is an apocalyptic number.

It is an amenable number.

21936039896 is a deficient number, since it is larger than the sum of its proper divisors (21633523144).

21936039896 is a wasteful number, since it uses less digits than its factorization.

21936039896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74363 (or 74359 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 56.

The spelling of 21936039896 in words is "twenty-one billion, nine hundred thirty-six million, thirty-nine thousand, eight hundred ninety-six".