20125331 has 4 divisors (see below), whose sum is σ = 21309192. Its totient is φ = 18941472.

The previous prime is 20125321. The next prime is 20125363. The reversal of 20125331 is 13352102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20125331 - 2⁶ = 20125267 is a prime.

It is a super-2 number, since 2×20125331² = 810057895719122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1183843 = 20125331 / (2 + 0 + 1 + 2 + 5 + 3 + 3 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20125321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591905 + ... + 591938.

It is an arithmetic number, because the mean of its divisors is an integer number (5327298).

Almost surely, 2^20125331 is an apocalyptic number.

20125331 is a deficient number, since it is larger than the sum of its proper divisors (1183861).

20125331 is a wasteful number, since it uses less digits than its factorization.

20125331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183860.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 20125331 is about 4486.1265028976. The cubic root of 20125331 is about 272.0075825092.

Adding to 20125331 its reverse (13352102), we get a palindrome (33477433).

The spelling of 20125331 in words is "twenty million, one hundred twenty-five thousand, three hundred thirty-one".