21983921535 has 32 divisors (see below), whose sum is σ = 37281892032. Its totient is φ = 11023646720.

The previous prime is 21983921513. The next prime is 21983921549. The reversal of 21983921535 is 53512938912.

It is not a de Polignac number, because 21983921535 - 2⁵ = 21983921503 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205015 + ... + 293255.

It is an arithmetic number, because the mean of its divisors is an integer number (1165059126).

Almost surely, 2^21983921535 is an apocalyptic number.

21983921535 is a deficient number, since it is larger than the sum of its proper divisors (15297970497).

21983921535 is a wasteful number, since it uses less digits than its factorization.

21983921535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89243.

The product of its digits is 583200, while the sum is 48.

The spelling of 21983921535 in words is "twenty-one billion, nine hundred eighty-three million, nine hundred twenty-one thousand, five hundred thirty-five".