20132331 has 8 divisors (see below), whose sum is σ = 26903184. Its totient is φ = 13391520.

The previous prime is 20132311. The next prime is 20132341. The reversal of 20132331 is 13323102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20132331 - 2⁹ = 20131819 is a prime.

It is a super-2 number, since 2×20132331² = 810621502987122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20132331.

It is not an unprimeable number, because it can be changed into a prime (20132311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5896 + ... + 8661.

It is an arithmetic number, because the mean of its divisors is an integer number (3362898).

Almost surely, 2^20132331 is an apocalyptic number.

20132331 is a deficient number, since it is larger than the sum of its proper divisors (6770853).

20132331 is a wasteful number, since it uses less digits than its factorization.

20132331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15021.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 20132331 is about 4486.9066181502. The cubic root of 20132331 is about 272.0391154459.

Adding to 20132331 its reverse (13323102), we get a palindrome (33455433).

The spelling of 20132331 in words is "twenty million, one hundred thirty-two thousand, three hundred thirty-one".