20457165165160 has 32 divisors (see below), whose sum is σ = 46219611774600. Its totient is φ = 8148912261120.

The previous prime is 20457165165149. The next prime is 20457165165163. The reversal of 20457165165160 is 6156156175402.

It can be written as a sum of positive squares in 4 ways, for example, as 18403945560324 + 2053219604836 = 4289982^2 + 1432906^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20457165165163) 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, 1061046645 + ... + 1061065924.

Almost surely, 2^{20457165165160} is an apocalyptic number.

20457165165160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20457165165160 is an abundant number, since it is smaller than the sum of its proper divisors (25762446609440).

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

20457165165160 is a wasteful number, since it uses less digits than its factorization.

20457165165160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122112821 (or 2122112817 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 49.

The spelling of 20457165165160 in words is "twenty trillion, four hundred fifty-seven billion, one hundred sixty-five million, one hundred sixty-five thousand, one hundred sixty".