20311111314240 has 56 divisors (see below), whose sum is σ = 64487778425760. Its totient is φ = 5416296350208.

The previous prime is 20311111314161. The next prime is 20311111314383. The reversal of 20311111314240 is 4241311111302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20311111314240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10578702850 + ... + 10578704769.

Almost surely, 2^{20311111314240} is an apocalyptic number.

20311111314240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311111314240 is an abundant number, since it is smaller than the sum of its proper divisors (44176667111520).

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

20311111314240 is a wasteful number, since it uses less digits than its factorization.

20311111314240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21157407639 (or 21157407629 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 20311111314240 its reverse (4241311111302), we get a palindrome (24552422425542).

The spelling of 20311111314240 in words is "twenty trillion, three hundred eleven billion, one hundred eleven million, three hundred fourteen thousand, two hundred forty".