20440000021986 has 24 divisors (see below), whose sum is σ = 44287178111280. Its totient is φ = 6813254664216.

The previous prime is 20440000021957. The next prime is 20440000021997. The reversal of 20440000021986 is 68912000004402.

20440000021986 is a `hidden beast` number, since 20 + 440 + 0 + 0 + 0 + 0 + 2 + 198 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20440000021986.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4943560 + ... + 8082003.

It is an arithmetic number, because the mean of its divisors is an integer number (1845299087970).

Almost surely, 2^{20440000021986} is an apocalyptic number.

20440000021986 is an abundant number, since it is smaller than the sum of its proper divisors (23847178089294).

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

20440000021986 is a wasteful number, since it uses less digits than its factorization.

20440000021986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13112750 (or 13112747 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 20440000021986 in words is "twenty trillion, four hundred forty billion, twenty-one thousand, nine hundred eighty-six".