20311102033 has 4 divisors (see below), whose sum is σ = 20311387648. Its totient is φ = 20310816420.

The previous prime is 20311102027. The next prime is 20311102051. The reversal of 20311102033 is 33020111302.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20311102033 - 2⁹ = 20311101521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20311101998 and 20311102016.

It is not an unprimeable number, because it can be changed into a prime (20311102093) 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, 57760 + ... + 209662.

It is an arithmetic number, because the mean of its divisors is an integer number (5077846912).

Almost surely, 2^20311102033 is an apocalyptic number.

It is an amenable number.

20311102033 is a deficient number, since it is larger than the sum of its proper divisors (285615).

20311102033 is a wasteful number, since it uses less digits than its factorization.

20311102033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285614.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20311102033 its reverse (33020111302), we get a palindrome (53331213335).

The spelling of 20311102033 in words is "twenty billion, three hundred eleven million, one hundred two thousand, thirty-three".