20165960 has 16 divisors (see below), whose sum is σ = 45373500. Its totient is φ = 8066368.

The previous prime is 20165947. The next prime is 20165983. The reversal of 20165960 is 6956102.

It can be written as a sum of positive squares in 2 ways, for example, as 18267076 + 1898884 = 4274^2 + 1378^2 .

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, 252035 + ... + 252114.

Almost surely, 2^20165960 is an apocalyptic number.

20165960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20165960 is an abundant number, since it is smaller than the sum of its proper divisors (25207540).

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

20165960 is a wasteful number, since it uses less digits than its factorization.

20165960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504160 (or 504156 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 20165960 is about 4490.6525138336. The cubic root of 20165960 is about 272.1905023587.

The spelling of 20165960 in words is "twenty million, one hundred sixty-five thousand, nine hundred sixty".