21489363882 has 32 divisors (see below), whose sum is σ = 54576163200. Its totient is φ = 6139818144.

The previous prime is 21489363881. The next prime is 21489363911. The reversal of 21489363882 is 28836398412.

21489363882 is a `hidden beast` number, since 21 + 489 + 3 + 63 + 8 + 82 = 666.

It is a super-2 number, since 2×21489363882² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (21489363881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28424707 + ... + 28425462.

It is an arithmetic number, because the mean of its divisors is an integer number (1705505100).

Almost surely, 2^21489363882 is an apocalyptic number.

21489363882 is an abundant number, since it is smaller than the sum of its proper divisors (33086799318).

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

21489363882 is a wasteful number, since it uses less digits than its factorization.

21489363882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56850187 (or 56850181 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The spelling of 21489363882 in words is "twenty-one billion, four hundred eighty-nine million, three hundred sixty-three thousand, eight hundred eighty-two".