20625520 has 40 divisors (see below), whose sum is σ = 48166560. Its totient is φ = 8213760.

The previous prime is 20625499. The next prime is 20625529. The reversal of 20625520 is 2552602.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 20625491 and 20625500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20625529) 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, 24466 + ... + 25294.

It is an arithmetic number, because the mean of its divisors is an integer number (1204164).

Almost surely, 2^20625520 is an apocalyptic number.

20625520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20625520 is an abundant number, since it is smaller than the sum of its proper divisors (27541040).

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

20625520 is a wasteful number, since it uses less digits than its factorization.

20625520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153 (or 1147 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20625520 is about 4541.5327809012. The cubic root of 20625520 is about 274.2426323291.

The spelling of 20625520 in words is "twenty million, six hundred twenty-five thousand, five hundred twenty".