20945625 has 20 divisors (see below), whose sum is σ = 34901328. Its totient is φ = 11170000.

The previous prime is 20945623. The next prime is 20945651. The reversal of 20945625 is 52654902.

It is not a de Polignac number, because 20945625 - 2¹ = 20945623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20945621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3711 + ... + 7460.

Almost surely, 2^20945625 is an apocalyptic number.

20945625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20945625 is a deficient number, since it is larger than the sum of its proper divisors (13955703).

20945625 is an equidigital number, since it uses as much as digits as its factorization.

20945625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11194 (or 11179 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 20945625 is about 4576.6390506572. The cubic root of 20945625 is about 275.6540903886.

The spelling of 20945625 in words is "twenty million, nine hundred forty-five thousand, six hundred twenty-five".