21068870088 has 32 divisors (see below), whose sum is σ = 60196772160. Its totient is φ = 6019677120.

The previous prime is 21068870071. The next prime is 21068870143. The reversal of 21068870088 is 88007886012.

It is a super-2 number, since 2×21068870088² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62704803 + ... + 62705138.

It is an arithmetic number, because the mean of its divisors is an integer number (1881149130).

Almost surely, 2^21068870088 is an apocalyptic number.

21068870088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21068870088 is an abundant number, since it is smaller than the sum of its proper divisors (39127902072).

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

21068870088 is a wasteful number, since it uses less digits than its factorization.

21068870088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125409957 (or 125409953 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 48.

The spelling of 21068870088 in words is "twenty-one billion, sixty-eight million, eight hundred seventy thousand, eighty-eight".