21877885923 has 8 divisors (see below), whose sum is σ = 29178160128. Its totient is φ = 14581434504.

The previous prime is 21877885907. The next prime is 21877885933. The reversal of 21877885923 is 32958877812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21877885923 - 2⁴ = 21877885907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21877885903) 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, 942315 + ... + 965252.

It is an arithmetic number, because the mean of its divisors is an integer number (3647270016).

Almost surely, 2^21877885923 is an apocalyptic number.

21877885923 is a deficient number, since it is larger than the sum of its proper divisors (7300274205).

21877885923 is a wasteful number, since it uses less digits than its factorization.

21877885923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911393.

The product of its digits is 13547520, while the sum is 60.

The spelling of 21877885923 in words is "twenty-one billion, eight hundred seventy-seven million, eight hundred eighty-five thousand, nine hundred twenty-three".