18937878485760 has 2016 divisors, whose sum is σ = 77287429739520. Its totient is φ = 4408960647168.

The previous prime is 18937878485759. The next prime is 18937878485803. The reversal of 18937878485760 is 6758487873981.

18937878485760 is a `hidden beast` number, since 1 + 8 + 9 + 3 + 7 + 8 + 78 + 485 + 7 + 60 = 666.

It is a super-2 number, since 2×18937878485760² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 18937878485760.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 28737296311 + ... + 28737296969.

It is an arithmetic number, because the mean of its divisors is an integer number (38337018720).

Almost surely, 2^{18937878485760} is an apocalyptic number.

18937878485760 is a gapful number since it is divisible by the number (10) 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 18937878485760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38643714869760).

18937878485760 is an abundant number, since it is smaller than the sum of its proper divisors (58349551253760).

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

18937878485760 is a wasteful number, since it uses less digits than its factorization.

18937878485760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 4551966720, while the sum is 81.

The spelling of 18937878485760 in words is "eighteen trillion, nine hundred thirty-seven billion, eight hundred seventy-eight million, four hundred eighty-five thousand, seven hundred sixty".