21913069983 has 16 divisors (see below), whose sum is σ = 33396477696. Its totient is φ = 12519829440.

The previous prime is 21913069973. The next prime is 21913069991. The reversal of 21913069983 is 38996031912.

It is a happy number.

It is not a de Polignac number, because 21913069983 - 2⁴ = 21913069967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21913069903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65848 + ... + 219458.

It is an arithmetic number, because the mean of its divisors is an integer number (2087279856).

Almost surely, 2^21913069983 is an apocalyptic number.

21913069983 is a deficient number, since it is larger than the sum of its proper divisors (11483407713).

21913069983 is a wasteful number, since it uses less digits than its factorization.

21913069983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160414.

The product of its (nonzero) digits is 629856, while the sum is 51.

The spelling of 21913069983 in words is "twenty-one billion, nine hundred thirteen million, sixty-nine thousand, nine hundred eighty-three".