21623839862 has 16 divisors (see below), whose sum is σ = 32653668240. Its totient is φ = 10739400672.

The previous prime is 21623839859. The next prime is 21623839943. The reversal of 21623839862 is 26893832612.

It is a super-3 number, since 3×21623839862³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21623839862.

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, 349589 + ... + 406767.

It is an arithmetic number, because the mean of its divisors is an integer number (2040854265).

Almost surely, 2^21623839862 is an apocalyptic number.

21623839862 is a deficient number, since it is larger than the sum of its proper divisors (11029828378).

21623839862 is a wasteful number, since it uses less digits than its factorization.

21623839862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58447.

The product of its digits is 1492992, while the sum is 50.

The spelling of 21623839862 in words is "twenty-one billion, six hundred twenty-three million, eight hundred thirty-nine thousand, eight hundred sixty-two".