18383087697408 has 1120 divisors, whose sum is σ = 66079331366400. Its totient is φ = 4992959397888.

The previous prime is 18383087697407. The next prime is 18383087697409. The reversal of 18383087697408 is 80479678038381.

18383087697408 is a `hidden beast` number, since 1 + 8 + 3 + 83 + 0 + 87 + 69 + 7 + 408 = 666.

It is an interprime number because it is at equal distance from previous prime (18383087697407) and next prime (18383087697409).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18383087697407) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 10756633258 + ... + 10756634966.

Almost surely, 2^{18383087697408} is an apocalyptic number.

18383087697408 is a gapful number since it is divisible by the number (18) 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 18383087697408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33039665683200).

18383087697408 is an abundant number, since it is smaller than the sum of its proper divisors (47696243668992).

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

18383087697408 is an equidigital number, since it uses as much as digits as its factorization.

18383087697408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954 (or 1923 counting only the distinct ones).

The product of its (nonzero) digits is 390168576, while the sum is 72.

The spelling of 18383087697408 in words is "eighteen trillion, three hundred eighty-three billion, eighty-seven million, six hundred ninety-seven thousand, four hundred eight".