23311321002 has 24 divisors (see below), whose sum is σ = 50526158436. Its totient is φ = 7767625536.

The previous prime is 23311320961. The next prime is 23311321003. The reversal of 23311321002 is 20012311332.

It can be written as a sum of positive squares in 2 ways, for example, as 23301717201 + 9603801 = 152649^2 + 3099^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (23311321003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183193 + ... + 283164.

Almost surely, 2^23311321002 is an apocalyptic number.

23311321002 is an abundant number, since it is smaller than the sum of its proper divisors (27214837434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23311321002 is a wasteful number, since it uses less digits than its factorization.

23311321002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469142 (or 469139 counting only the distinct ones).

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

Adding to 23311321002 its reverse (20012311332), we get a palindrome (43323632334).

The spelling of 23311321002 in words is "twenty-three billion, three hundred eleven million, three hundred twenty-one thousand, two".