21885088140 has 96 divisors (see below), whose sum is σ = 68124672000. Its totient is φ = 5832789696.

The previous prime is 21885088139. The next prime is 21885088187. The reversal of 21885088140 is 4188058812.

21885088140 is a `hidden beast` number, since 21 + 8 + 8 + 508 + 81 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1058421 + ... + 1078899.

It is an arithmetic number, because the mean of its divisors is an integer number (709632000).

Almost surely, 2^21885088140 is an apocalyptic number.

21885088140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21885088140 is an abundant number, since it is smaller than the sum of its proper divisors (46239583860).

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

21885088140 is a wasteful number, since it uses less digits than its factorization.

21885088140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22476 (or 22468 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 45.

The spelling of 21885088140 in words is "twenty-one billion, eight hundred eighty-five million, eighty-eight thousand, one hundred forty".