20345925 has 12 divisors (see below), whose sum is σ = 33638720. Its totient is φ = 10851120.

The previous prime is 20345921. The next prime is 20345933. The reversal of 20345925 is 52954302.

It is not a de Polignac number, because 20345925 - 2² = 20345921 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20345892 and 20345901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135565 + ... + 135714.

Almost surely, 2^20345925 is an apocalyptic number.

20345925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20345925 is a deficient number, since it is larger than the sum of its proper divisors (13292795).

20345925 is a wasteful number, since it uses less digits than its factorization.

20345925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271292 (or 271287 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 20345925 is about 4510.6457409112. The cubic root of 20345925 is about 272.9977994965.

The spelling of 20345925 in words is "twenty million, three hundred forty-five thousand, nine hundred twenty-five".