20155023631120 has 640 divisors, whose sum is σ = 58600713600000. Its totient is φ = 6421264367616.

The previous prime is 20155023631111. The next prime is 20155023631159. The reversal of 20155023631120 is 2113632055102.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 19779217971 + ... + 19779218989.

It is an arithmetic number, because the mean of its divisors is an integer number (91563615000).

Almost surely, 2^{20155023631120} is an apocalyptic number.

20155023631120 is a gapful number since it is divisible by the number (20) 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 20155023631120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29300356800000).

20155023631120 is an abundant number, since it is smaller than the sum of its proper divisors (38445689968880).

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

20155023631120 is a wasteful number, since it uses less digits than its factorization.

20155023631120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568 (or 1548 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 20155023631120 its reverse (2113632055102), we get a palindrome (22268655686222).

The spelling of 20155023631120 in words is "twenty trillion, one hundred fifty-five billion, twenty-three million, six hundred thirty-one thousand, one hundred twenty".