20313111308 has 18 divisors (see below), whose sum is σ = 41351691276. Its totient is φ = 8705619048.

The previous prime is 20313111307. The next prime is 20313111341. The reversal of 20313111308 is 80311131302.

It is a super-2 number, since 2×20313111308² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20313111307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51818966 + ... + 51819357.

It is an arithmetic number, because the mean of its divisors is an integer number (2297316182).

Almost surely, 2^20313111308 is an apocalyptic number.

20313111308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20313111308 is an abundant number, since it is smaller than the sum of its proper divisors (21038579968).

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

20313111308 is a wasteful number, since it uses less digits than its factorization.

20313111308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103638341 (or 103638332 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 20313111308 in words is "twenty billion, three hundred thirteen million, one hundred eleven thousand, three hundred eight".