21824189937 has 32 divisors (see below), whose sum is σ = 36409221120. Its totient is φ = 12800106000.

The previous prime is 21824189921. The next prime is 21824189969. The reversal of 21824189937 is 73998142812.

21824189937 is a `hidden beast` number, since 218 + 2 + 418 + 9 + 9 + 3 + 7 = 666.

It is not a de Polignac number, because 21824189937 - 2⁴ = 21824189921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21824189437) 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, 1175989 + ... + 1194402.

It is an arithmetic number, because the mean of its divisors is an integer number (1137788160).

Almost surely, 2^21824189937 is an apocalyptic number.

21824189937 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21824189937 is a deficient number, since it is larger than the sum of its proper divisors (14585031183).

21824189937 is a wasteful number, since it uses less digits than its factorization.

21824189937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370442 (or 2370436 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 21824189937 in words is "twenty-one billion, eight hundred twenty-four million, one hundred eighty-nine thousand, nine hundred thirty-seven".