21889683923 has 16 divisors (see below), whose sum is σ = 23386644000. Its totient is φ = 20448594432.

The previous prime is 21889683887. The next prime is 21889683941. The reversal of 21889683923 is 32938698812.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21889683923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21889683983) 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, 135083 + ... + 249051.

It is an arithmetic number, because the mean of its divisors is an integer number (1461665250).

Almost surely, 2^21889683923 is an apocalyptic number.

21889683923 is a deficient number, since it is larger than the sum of its proper divisors (1496960077).

21889683923 is a wasteful number, since it uses less digits than its factorization.

21889683923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114214.

The product of its digits is 8957952, while the sum is 59.

The spelling of 21889683923 in words is "twenty-one billion, eight hundred eighty-nine million, six hundred eighty-three thousand, nine hundred twenty-three".