20516296458072 has 32 divisors (see below), whose sum is σ = 51409745210880. Its totient is φ = 6822898277280.

The previous prime is 20516296458043. The next prime is 20516296458089. The reversal of 20516296458072 is 27085469261502.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 991689988 + ... + 991710675.

It is an arithmetic number, because the mean of its divisors is an integer number (1606554537840).

Almost surely, 2^{20516296458072} is an apocalyptic number.

It is an amenable number.

20516296458072 is an abundant number, since it is smaller than the sum of its proper divisors (30893448752808).

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

20516296458072 is a wasteful number, since it uses less digits than its factorization.

20516296458072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983401103 (or 1983401099 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 57.

The spelling of 20516296458072 in words is "twenty trillion, five hundred sixteen billion, two hundred ninety-six million, four hundred fifty-eight thousand, seventy-two".