20108331 has 30 divisors (see below), whose sum is σ = 31946420. Its totient is φ = 12602304.

The previous prime is 20108329. The next prime is 20108351. The reversal of 20108331 is 13380102.

It is not a de Polignac number, because 20108331 - 2¹ = 20108329 is a prime.

It is a super-2 number, since 2×20108331² = 808689951211122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20108311) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 22980 + ... + 23838.

Almost surely, 2^20108331 is an apocalyptic number.

20108331 is a deficient number, since it is larger than the sum of its proper divisors (11838089).

20108331 is an equidigital number, since it uses as much as digits as its factorization.

20108331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20108331 is about 4484.2313722644. The cubic root of 20108331 is about 271.9309720670.

Adding to 20108331 its reverse (13380102), we get a palindrome (33488433).

The spelling of 20108331 in words is "twenty million, one hundred eight thousand, three hundred thirty-one".