20545960 has 16 divisors (see below), whose sum is σ = 46228500. Its totient is φ = 8218368.

The previous prime is 20545957. The next prime is 20546023. The reversal of 20545960 is 6954502.

It can be written as a sum of positive squares in 2 ways, for example, as 19589476 + 956484 = 4426^2 + 978^2 .

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, 256785 + ... + 256864.

Almost surely, 2^20545960 is an apocalyptic number.

20545960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20545960 is an abundant number, since it is smaller than the sum of its proper divisors (25682540).

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

20545960 is a wasteful number, since it uses less digits than its factorization.

20545960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513660 (or 513656 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 20545960 is about 4532.7651604732. The cubic root of 20545960 is about 273.8895606920.

The spelling of 20545960 in words is "twenty million, five hundred forty-five thousand, nine hundred sixty".