20403011233 has 4 divisors (see below), whose sum is σ = 22257830448. Its totient is φ = 18548192020.

The previous prime is 20403011207. The next prime is 20403011249. The reversal of 20403011233 is 33211030402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20403011233 - 2²⁵ = 20369456801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20403011233.

It is not an unprimeable number, because it can be changed into a prime (20403011203) 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, 927409591 + ... + 927409612.

It is an arithmetic number, because the mean of its divisors is an integer number (5564457612).

Almost surely, 2^20403011233 is an apocalyptic number.

It is an amenable number.

20403011233 is a deficient number, since it is larger than the sum of its proper divisors (1854819215).

20403011233 is a wasteful number, since it uses less digits than its factorization.

20403011233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854819214.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20403011233 its reverse (33211030402), we get a palindrome (53614041635).

The spelling of 20403011233 in words is "twenty billion, four hundred three million, eleven thousand, two hundred thirty-three".