20113331 has 4 divisors (see below), whose sum is σ = 22986672. Its totient is φ = 17239992.

The previous prime is 20113319. The next prime is 20113337. The reversal of 20113331 is 13331102.

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

It is not a de Polignac number, because 20113331 - 2¹⁸ = 19851187 is a prime.

It is a super-3 number, since 3×20113331³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113337) 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, 1436660 + ... + 1436673.

It is an arithmetic number, because the mean of its divisors is an integer number (5746668).

Almost surely, 2^20113331 is an apocalyptic number.

20113331 is a deficient number, since it is larger than the sum of its proper divisors (2873341).

20113331 is an equidigital number, since it uses as much as digits as its factorization.

20113331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873340.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 20113331 is about 4484.7888467574. The cubic root of 20113331 is about 271.9535090307.

Adding to 20113331 its reverse (13331102), we get a palindrome (33444433).

The spelling of 20113331 in words is "twenty million, one hundred thirteen thousand, three hundred thirty-one".