20113303331 has 4 divisors (see below), whose sum is σ = 21941785464. Its totient is φ = 18284821200.

The previous prime is 20113303261. The next prime is 20113303333. The reversal of 20113303331 is 13330331102.

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 20113303331 - 2¹⁸ = 20113041187 is a prime.

It is a super-2 number, since 2×20113303331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113303333) 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, 914241050 + ... + 914241071.

It is an arithmetic number, because the mean of its divisors is an integer number (5485446366).

Almost surely, 2^20113303331 is an apocalyptic number.

20113303331 is a deficient number, since it is larger than the sum of its proper divisors (1828482133).

20113303331 is a wasteful number, since it uses less digits than its factorization.

20113303331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828482132.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 20113303331 its reverse (13330331102), we get a palindrome (33443634433).

The spelling of 20113303331 in words is "twenty billion, one hundred thirteen million, three hundred three thousand, three hundred thirty-one".