20087331 has 12 divisors (see below), whose sum is σ = 29439816. Its totient is φ = 12173920.

The previous prime is 20087311. The next prime is 20087341. The reversal of 20087331 is 13378002.

It is not a de Polignac number, because 20087331 - 2⁵ = 20087299 is a prime.

It is a super-2 number, since 2×20087331² = 807001733407122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20087311) 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, 27306 + ... + 28031.

It is an arithmetic number, because the mean of its divisors is an integer number (2453318).

Almost surely, 2^20087331 is an apocalyptic number.

20087331 is a deficient number, since it is larger than the sum of its proper divisors (9352485).

20087331 is a wasteful number, since it uses less digits than its factorization.

20087331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55362 (or 55351 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 20087331 is about 4481.8892221919. The cubic root of 20087331 is about 271.8362760014.

It can be divided in two parts, 2008 and 7331, that added together give a palindrome (9339).

The spelling of 20087331 in words is "twenty million, eighty-seven thousand, three hundred thirty-one".