161760020 has 12 divisors (see below), whose sum is σ = 339696084. Its totient is φ = 64704000.

The previous prime is 161759959. The next prime is 161760061. The reversal of 161760020 is 20067161.

It can be written as a sum of positive squares in 2 ways, for example, as 99760144 + 61999876 = 9988^2 + 7874^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4043981 + ... + 4044020.

It is an arithmetic number, because the mean of its divisors is an integer number (28308007).

Almost surely, 2^161760020 is an apocalyptic number.

161760020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161760020 is an abundant number, since it is smaller than the sum of its proper divisors (177936064).

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

161760020 is a wasteful number, since it uses less digits than its factorization.

161760020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8088010 (or 8088008 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 161760020 is about 12718.4912627245. The cubic root of 161760020 is about 544.8668642053.

The spelling of 161760020 in words is "one hundred sixty-one million, seven hundred sixty thousand, twenty".