20311111111302 has 96 divisors (see below), whose sum is σ = 48993186247200. Its totient is φ = 6028963100160.

The previous prime is 20311111111289. The next prime is 20311111111307.

20311111111302 is a `hidden beast` number, since 20 + 311 + 11 + 11 + 11 + 302 = 666.

20311111111302 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311111111307) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4906324 + ... + 8043272.

It is an arithmetic number, because the mean of its divisors is an integer number (510345690075).

Almost surely, 2^{20311111111302} is an apocalyptic number.

20311111111302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20311111111302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24496593123600).

20311111111302 is an abundant number, since it is smaller than the sum of its proper divisors (28682075135898).

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

20311111111302 is a wasteful number, since it uses less digits than its factorization.

20311111111302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137638 (or 3137635 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

It can be divided in two parts, 2031111 and 1111302, that added together give a palindrome (3142413).

The spelling of 20311111111302 in words is "twenty trillion, three hundred eleven billion, one hundred eleven million, one hundred eleven thousand, three hundred two".