18343366790400 has 270 divisors, whose sum is σ = 67823786778902. Its totient is φ = 4891564339200.

The previous prime is 18343366790347. The next prime is 18343366790431. The reversal of 18343366790400 is 409766334381.

It is a happy number.

18343366790400 is a `hidden beast` number, since 1 + 83 + 4 + 33 + 66 + 79 + 0 + 400 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 5403058504704 + 12940308285696 = 2324448^2 + 3597264^2 .

It is a tau number, because it is divible by the number of its divisors (270).

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 polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 17173891 + ... + 18210690.

Almost surely, 2^{18343366790400} is an apocalyptic number.

18343366790400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18343366790400 is an abundant number, since it is smaller than the sum of its proper divisors (49480419988502).

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

18343366790400 is an equidigital number, since it uses as much as digits as its factorization.

18343366790400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35384619 (or 35384591 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 18343366790400 in words is "eighteen trillion, three hundred forty-three billion, three hundred sixty-six million, seven hundred ninety thousand, four hundred".