23311020321 has 32 divisors (see below), whose sum is σ = 35112631680. Its totient is φ = 15282805248.

The previous prime is 23311020277. The next prime is 23311020391. The reversal of 23311020321 is 12302011332.

23311020321 is a `hidden beast` number, since 2 + 331 + 10 + 2 + 0 + 321 = 666.

It is not a de Polignac number, because 23311020321 - 2⁷ = 23311020193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23311020294 and 23311020303.

It is not an unprimeable number, because it can be changed into a prime (23311020391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366345 + ... + 425241.

It is an arithmetic number, because the mean of its divisors is an integer number (1097269740).

Almost surely, 2^23311020321 is an apocalyptic number.

It is an amenable number.

23311020321 is a deficient number, since it is larger than the sum of its proper divisors (11801611359).

23311020321 is a wasteful number, since it uses less digits than its factorization.

23311020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59150 (or 59144 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23311020321 its reverse (12302011332), we get a palindrome (35613031653).

The spelling of 23311020321 in words is "twenty-three billion, three hundred eleven million, twenty thousand, three hundred twenty-one".