21830522188 has 24 divisors (see below), whose sum is σ = 42579658800. Its totient is φ = 9732492288.

The previous prime is 21830522179. The next prime is 21830522213. The reversal of 21830522188 is 88122503812.

It is a self number, because there is not a number n which added to its sum of digits gives 21830522188.

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, 8447053 + ... + 8449636.

It is an arithmetic number, because the mean of its divisors is an integer number (1774152450).

Almost surely, 2^21830522188 is an apocalyptic number.

It is an amenable number.

21830522188 is a deficient number, since it is larger than the sum of its proper divisors (20749136612).

21830522188 is a wasteful number, since it uses less digits than its factorization.

21830522188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16896729 (or 16896727 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The spelling of 21830522188 in words is "twenty-one billion, eight hundred thirty million, five hundred twenty-two thousand, one hundred eighty-eight".