21885132379 has 32 divisors (see below), whose sum is σ = 24541102080. Its totient is φ = 19350576000.

The previous prime is 21885132323. The next prime is 21885132413. The reversal of 21885132379 is 97323158812.

It is a cyclic number.

It is not a de Polignac number, because 21885132379 - 2⁷ = 21885132251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21885132079) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15378862 + ... + 15380284.

It is an arithmetic number, because the mean of its divisors is an integer number (766909440).

Almost surely, 2^21885132379 is an apocalyptic number.

21885132379 is a deficient number, since it is larger than the sum of its proper divisors (2655969701).

21885132379 is a wasteful number, since it uses less digits than its factorization.

21885132379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771.

The product of its digits is 725760, while the sum is 49.

The spelling of 21885132379 in words is "twenty-one billion, eight hundred eighty-five million, one hundred thirty-two thousand, three hundred seventy-nine".