21883184988 has 36 divisors (see below), whose sum is σ = 59397217992. Its totient is φ = 6252338400.

The previous prime is 21883184971. The next prime is 21883184989. The reversal of 21883184988 is 88948138812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21883184989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18607563 + ... + 18608738.

It is an arithmetic number, because the mean of its divisors is an integer number (1649922722).

Almost surely, 2^21883184988 is an apocalyptic number.

21883184988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21883184988 is an abundant number, since it is smaller than the sum of its proper divisors (37514033004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21883184988 is a wasteful number, since it uses less digits than its factorization.

21883184988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37216322 (or 37216313 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 60.

The spelling of 21883184988 in words is "twenty-one billion, eight hundred eighty-three million, one hundred eighty-four thousand, nine hundred eighty-eight".