20311102344 has 128 divisors (see below), whose sum is σ = 56954983680. Its totient is φ = 5994777600.

The previous prime is 20311102333. The next prime is 20311102379. The reversal of 20311102344 is 44320111302.

It is a self number, because there is not a number n which added to its sum of digits gives 20311102344.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 807234 + ... + 832014.

It is an arithmetic number, because the mean of its divisors is an integer number (444960810).

Almost surely, 2^20311102344 is an apocalyptic number.

20311102344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20311102344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28477491840).

20311102344 is an abundant number, since it is smaller than the sum of its proper divisors (36643881336).

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

20311102344 is a wasteful number, since it uses less digits than its factorization.

20311102344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24911 (or 24907 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20311102344 its reverse (44320111302), we get a palindrome (64631213646).

The spelling of 20311102344 in words is "twenty billion, three hundred eleven million, one hundred two thousand, three hundred forty-four".