20158625 has 32 divisors (see below), whose sum is σ = 26732160. Its totient is φ = 15153600.

The previous prime is 20158613. The next prime is 20158627. The reversal of 20158625 is 52685102.

It is not a de Polignac number, because 20158625 - 2⁶ = 20158561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20158627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242834 + ... + 242916.

It is an arithmetic number, because the mean of its divisors is an integer number (835380).

Almost surely, 2^20158625 is an apocalyptic number.

20158625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20158625 is a deficient number, since it is larger than the sum of its proper divisors (6573535).

20158625 is an equidigital number, since it uses as much as digits as its factorization.

20158625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 20158625 is about 4489.8357430980. The cubic root of 20158625 is about 272.1574969137.

The spelling of 20158625 in words is "twenty million, one hundred fifty-eight thousand, six hundred twenty-five".