20453625 has 24 divisors (see below), whose sum is σ = 36873096. Its totient is φ = 10908000.

The previous prime is 20453623. The next prime is 20453627. The reversal of 20453625 is 52635402.

It is an interprime number because it is at equal distance from previous prime (20453623) and next prime (20453627).

It can be written as a sum of positive squares in 4 ways, for example, as 95481 + 20358144 = 309^2 + 4512^2 .

It is not a de Polignac number, because 20453625 - 2¹ = 20453623 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20453623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7966 + ... + 10215.

It is an arithmetic number, because the mean of its divisors is an integer number (1536379).

Almost surely, 2^20453625 is an apocalyptic number.

20453625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20453625 is a deficient number, since it is larger than the sum of its proper divisors (16419471).

20453625 is a wasteful number, since it uses less digits than its factorization.

20453625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18202 (or 18189 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 20453625 is about 4522.5684074428. The cubic root of 20453625 is about 273.4786514936.

The spelling of 20453625 in words is "twenty million, four hundred fifty-three thousand, six hundred twenty-five".