21068158992 has 40 divisors (see below), whose sum is σ = 56181761280. Its totient is φ = 6796179840.

The previous prime is 21068158981. The next prime is 21068159029. The reversal of 21068158992 is 29985186012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7077867 + ... + 7080842.

It is an arithmetic number, because the mean of its divisors is an integer number (1404544032).

Almost surely, 2^21068158992 is an apocalyptic number.

It is an amenable number.

21068158992 is an abundant number, since it is smaller than the sum of its proper divisors (35113602288).

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

21068158992 is a wasteful number, since it uses less digits than its factorization.

21068158992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14158751 (or 14158745 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 51.

The spelling of 21068158992 in words is "twenty-one billion, sixty-eight million, one hundred fifty-eight thousand, nine hundred ninety-two".