20575520 has 48 divisors (see below), whose sum is σ = 55556928. Its totient is φ = 7054080.

The previous prime is 20575517. The next prime is 20575523. The reversal of 20575520 is 2557502.

It is an interprime number because it is at equal distance from previous prime (20575517) and next prime (20575523).

It is a self number, because there is not a number n which added to its sum of digits gives 20575520.

It is not an unprimeable number, because it can be changed into a prime (20575523) 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, 8066 + ... + 10305.

It is an arithmetic number, because the mean of its divisors is an integer number (1157436).

Almost surely, 2^20575520 is an apocalyptic number.

20575520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20575520 is an abundant number, since it is smaller than the sum of its proper divisors (34981408).

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

20575520 is a wasteful number, since it uses less digits than its factorization.

20575520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18393 (or 18385 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 20575520 is about 4536.0246912908. The cubic root of 20575520 is about 274.0208483968.

The spelling of 20575520 in words is "twenty million, five hundred seventy-five thousand, five hundred twenty".