20026561992 has 32 divisors (see below), whose sum is σ = 50562118080. Its totient is φ = 6609425600.

The previous prime is 20026561991. The next prime is 20026562027. The reversal of 20026561992 is 29916562002.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20026561991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4128468 + ... + 4133315.

It is an arithmetic number, because the mean of its divisors is an integer number (1580066190).

Almost surely, 2^20026561992 is an apocalyptic number.

It is an amenable number.

20026561992 is an abundant number, since it is smaller than the sum of its proper divisors (30535556088).

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

20026561992 is a wasteful number, since it uses less digits than its factorization.

20026561992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8261893 (or 8261889 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 20026561992 in words is "twenty billion, twenty-six million, five hundred sixty-one thousand, nine hundred ninety-two".