20311230208 has 36 divisors (see below), whose sum is σ = 40693975560. Its totient is φ = 10117827584.

The previous prime is 20311230193. The next prime is 20311230259. The reversal of 20311230208 is 80203211302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78610 + ... + 216337.

It is an arithmetic number, because the mean of its divisors is an integer number (1130388210).

Almost surely, 2^20311230208 is an apocalyptic number.

It is an amenable number.

20311230208 is an abundant number, since it is smaller than the sum of its proper divisors (20382745352).

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

20311230208 is an equidigital number, since it uses as much as digits as its factorization.

20311230208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295232 (or 295218 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 20311230208 in words is "twenty billion, three hundred eleven million, two hundred thirty thousand, two hundred eight".