20472557166590 has 16 divisors (see below), whose sum is σ = 38039332026240. Its totient is φ = 7924860838560.

The previous prime is 20472557166577. The next prime is 20472557166637. The reversal of 20472557166590 is 9566175527402.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33020253185 + ... + 33020253804.

It is an arithmetic number, because the mean of its divisors is an integer number (2377458251640).

Almost surely, 2^{20472557166590} is an apocalyptic number.

20472557166590 is a deficient number, since it is larger than the sum of its proper divisors (17566774859650).

20472557166590 is a wasteful number, since it uses less digits than its factorization.

20472557166590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66040507027.

The product of its (nonzero) digits is 31752000, while the sum is 59.

The spelling of 20472557166590 in words is "twenty trillion, four hundred seventy-two billion, five hundred fifty-seven million, one hundred sixty-six thousand, five hundred ninety".