21658151088 has 80 divisors (see below), whose sum is σ = 71047912960. Its totient is φ = 6188042304.

The previous prime is 21658151059. The next prime is 21658151093. The reversal of 21658151088 is 88015185612.

21658151088 is a `hidden beast` number, since 2 + 1 + 6 + 58 + 1 + 510 + 88 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3578020 + ... + 3584067.

It is an arithmetic number, because the mean of its divisors is an integer number (888098912).

Almost surely, 2^21658151088 is an apocalyptic number.

21658151088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21658151088 is an abundant number, since it is smaller than the sum of its proper divisors (49389761872).

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

21658151088 is a wasteful number, since it uses less digits than its factorization.

21658151088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7162111 (or 7162099 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 45.

The spelling of 21658151088 in words is "twenty-one billion, six hundred fifty-eight million, one hundred fifty-one thousand, eighty-eight".