20313166505564 has 24 divisors (see below), whose sum is σ = 35556069623088. Its totient is φ = 10154289720960.

The previous prime is 20313166505561. The next prime is 20313166505603. The reversal of 20313166505564 is 46550566131302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313166505561) 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, 666143102 + ... + 666173594.

It is an arithmetic number, because the mean of its divisors is an integer number (1481502900962).

Almost surely, 2^{20313166505564} is an apocalyptic number.

It is an amenable number.

20313166505564 is a deficient number, since it is larger than the sum of its proper divisors (15242903117524).

20313166505564 is a wasteful number, since it uses less digits than its factorization.

20313166505564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62645 (or 62643 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 20313166505564 in words is "twenty trillion, three hundred thirteen billion, one hundred sixty-six million, five hundred five thousand, five hundred sixty-four".