20397325 has 12 divisors (see below), whose sum is σ = 27238708. Its totient is φ = 15062400.

The previous prime is 20397313. The next prime is 20397337. The reversal of 20397325 is 52379302.

It is an interprime number because it is at equal distance from previous prime (20397313) and next prime (20397337).

It can be written as a sum of positive squares in 6 ways, for example, as 5697769 + 14699556 = 2387^2 + 3834^2 .

It is not a de Polignac number, because 20397325 - 2⁷ = 20397197 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31056 + ... + 31705.

Almost surely, 2^20397325 is an apocalyptic number.

20397325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20397325 is a deficient number, since it is larger than the sum of its proper divisors (6841383).

20397325 is a wasteful number, since it uses less digits than its factorization.

20397325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62784 (or 62779 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 20397325 is about 4516.3397790689. The cubic root of 20397325 is about 273.2274980236.

The spelling of 20397325 in words is "twenty million, three hundred ninety-seven thousand, three hundred twenty-five".