20125431 has 24 divisors (see below), whose sum is σ = 29877120. Its totient is φ = 13050000.

The previous prime is 20125411. The next prime is 20125439. The reversal of 20125431 is 13452102.

It is not a de Polignac number, because 20125431 - 2⁶ = 20125367 is a prime.

It is a super-2 number, since 2×20125431² = 810065945871522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125439) 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, 80056 + ... + 80306.

It is an arithmetic number, because the mean of its divisors is an integer number (1244880).

Almost surely, 2^20125431 is an apocalyptic number.

20125431 is a deficient number, since it is larger than the sum of its proper divisors (9751689).

20125431 is a wasteful number, since it uses less digits than its factorization.

20125431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20125431 is about 4486.1376483563. The cubic root of 20125431 is about 272.0080330312.

Adding to 20125431 its reverse (13452102), we get a palindrome (33577533).

The spelling of 20125431 in words is "twenty million, one hundred twenty-five thousand, four hundred thirty-one".