20321311031120 has 80 divisors (see below), whose sum is σ = 51561595239552. Its totient is φ = 7386791892480.

The previous prime is 20321311031051. The next prime is 20321311031123. The reversal of 20321311031120 is 2113011312302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20321311031092 and 20321311031101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321311031123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1992347 + ... + 6679226.

Almost surely, 2^{20321311031120} is an apocalyptic number.

20321311031120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321311031120 is an abundant number, since it is smaller than the sum of its proper divisors (31240284208432).

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

20321311031120 is a wasteful number, since it uses less digits than its factorization.

20321311031120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8674260 (or 8674254 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20321311031120 its reverse (2113011312302), we get a palindrome (22434322343422).

The spelling of 20321311031120 in words is "twenty trillion, three hundred twenty-one billion, three hundred eleven million, thirty-one thousand, one hundred twenty".