20183881561140 has 96 divisors (see below), whose sum is σ = 62432996290560. Its totient is φ = 4831124688000.

The previous prime is 20183881561117. The next prime is 20183881561183. The reversal of 20183881561140 is 4116518838102.

It is a self number, because there is not a number n which added to its sum of digits gives 20183881561140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193502536 + ... + 193606815.

It is an arithmetic number, because the mean of its divisors is an integer number (650343711360).

Almost surely, 2^{20183881561140} is an apocalyptic number.

20183881561140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20183881561140 is an abundant number, since it is smaller than the sum of its proper divisors (42249114729420).

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

20183881561140 is a wasteful number, since it uses less digits than its factorization.

20183881561140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387109453 (or 387109451 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 48.

The spelling of 20183881561140 in words is "twenty trillion, one hundred eighty-three billion, eight hundred eighty-one million, five hundred sixty-one thousand, one hundred forty".