20625523 has 4 divisors (see below), whose sum is σ = 20655648. Its totient is φ = 20595400.

The previous prime is 20625499. The next prime is 20625529. The reversal of 20625523 is 32552602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20625523 - 2⁵ = 20625491 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 14011 + ... + 15412.

It is an arithmetic number, because the mean of its divisors is an integer number (5163912).

Almost surely, 2^20625523 is an apocalyptic number.

20625523 is a deficient number, since it is larger than the sum of its proper divisors (30125).

20625523 is an equidigital number, since it uses as much as digits as its factorization.

20625523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30124.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 20625523 is about 4541.5331111861. The cubic root of 20625523 is about 274.2426456253.

The spelling of 20625523 in words is "twenty million, six hundred twenty-five thousand, five hundred twenty-three".