18949727457360 has 480 divisors, whose sum is σ = 78025458551040. Its totient is φ = 4182007947264.

The previous prime is 18949727457313. The next prime is 18949727457379. The reversal of 18949727457360 is 6375472794981.

18949727457360 is a `hidden beast` number, since 1 + 8 + 9 + 4 + 97 + 27 + 457 + 3 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1545384 + ... + 6347256.

It is an arithmetic number, because the mean of its divisors is an integer number (162553038648).

It is a 1-persistent number, because it is pandigital, but 2⋅18949727457360 = 37899454914720 is not.

Almost surely, 2^{18949727457360} is an apocalyptic number.

18949727457360 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 18949727457360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39012729275520).

18949727457360 is an abundant number, since it is smaller than the sum of its proper divisors (59075731093680).

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

18949727457360 is a wasteful number, since it uses less digits than its factorization.

18949727457360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4801937 (or 4801919 counting only the distinct ones).

The product of its (nonzero) digits is 640120320, while the sum is 72.

The spelling of 18949727457360 in words is "eighteen trillion, nine hundred forty-nine billion, seven hundred twenty-seven million, four hundred fifty-seven thousand, three hundred sixty".