20311113400 has 24 divisors (see below), whose sum is σ = 47223339120. Its totient is φ = 8124445280.

The previous prime is 20311113397. The next prime is 20311113419. The reversal of 20311113400 is 431111302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50777584 + ... + 50777983.

It is an arithmetic number, because the mean of its divisors is an integer number (1967639130).

Almost surely, 2^20311113400 is an apocalyptic number.

20311113400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311113400 is an abundant number, since it is smaller than the sum of its proper divisors (26912225720).

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

20311113400 is a wasteful number, since it uses less digits than its factorization.

20311113400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101555583 (or 101555574 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20311113400 its reverse (431111302), we get a palindrome (20742224702).

The spelling of 20311113400 in words is "twenty billion, three hundred eleven million, one hundred thirteen thousand, four hundred".