18774685440 has 432 divisors, whose sum is σ = 76996727808. Its totient is φ = 4290859008.

The previous prime is 18774685439. The next prime is 18774685451. The reversal of 18774685440 is 4458647781.

18774685440 is a `hidden beast` number, since 1 + 87 + 7 + 46 + 85 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2172969 + ... + 2181591.

Almost surely, 2^18774685440 is an apocalyptic number.

18774685440 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 18774685440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38498363904).

18774685440 is an abundant number, since it is smaller than the sum of its proper divisors (58222042368).

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

18774685440 is an frugal number, since it uses more digits than its factorization.

18774685440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8666 (or 8640 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 54.

The spelling of 18774685440 in words is "eighteen billion, seven hundred seventy-four million, six hundred eighty-five thousand, four hundred forty".