20311152455120 has 80 divisors (see below), whose sum is σ = 48502862493120. Its totient is φ = 7905389184000.

The previous prime is 20311152455081. The next prime is 20311152455137. The reversal of 20311152455120 is 2155425111302.

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

It is a super-2 number, since 2×20311152455120² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6926306 + ... + 9412545.

It is an arithmetic number, because the mean of its divisors is an integer number (606285781164).

Almost surely, 2^{20311152455120} is an apocalyptic number.

20311152455120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311152455120 is an abundant number, since it is smaller than the sum of its proper divisors (28191710038000).

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

20311152455120 is a wasteful number, since it uses less digits than its factorization.

20311152455120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16339284 (or 16339278 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 20311152455120 its reverse (2155425111302), we get a palindrome (22466577566422).

The spelling of 20311152455120 in words is "twenty trillion, three hundred eleven billion, one hundred fifty-two million, four hundred fifty-five thousand, one hundred twenty".