20403113033 has 4 divisors (see below), whose sum is σ = 21290204928. Its totient is φ = 19516021140.

The previous prime is 20403112997. The next prime is 20403113063. The reversal of 20403113033 is 33031130402.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33031130402 = 2 ⋅16515565201.

It is a cyclic number.

It is not a de Polignac number, because 20403113033 - 2²⁰ = 20402064457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20403112996 and 20403113014.

It is not an unprimeable number, because it can be changed into a prime (20403113063) 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, 443545913 + ... + 443545958.

It is an arithmetic number, because the mean of its divisors is an integer number (5322551232).

Almost surely, 2^20403113033 is an apocalyptic number.

20403113033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20403113033 is a deficient number, since it is larger than the sum of its proper divisors (887091895).

20403113033 is an equidigital number, since it uses as much as digits as its factorization.

20403113033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887091894.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20403113033 its reverse (33031130402), we get a palindrome (53434243435).

The spelling of 20403113033 in words is "twenty billion, four hundred three million, one hundred thirteen thousand, thirty-three".