18303836421388 has 96 divisors (see below), whose sum is σ = 39775592102400. Its totient is φ = 7195026009600.

The previous prime is 18303836421373. The next prime is 18303836421401. The reversal of 18303836421388 is 88312463830381.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345543 + ... + 6060286.

It is an arithmetic number, because the mean of its divisors is an integer number (414329084400).

Almost surely, 2^{18303836421388} is an apocalyptic number.

It is an amenable number.

18303836421388 is an abundant number, since it is smaller than the sum of its proper divisors (21471755681012).

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

18303836421388 is a wasteful number, since it uses less digits than its factorization.

18303836421388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406031 (or 6406029 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 58.

The spelling of 18303836421388 in words is "eighteen trillion, three hundred three billion, eight hundred thirty-six million, four hundred twenty-one thousand, three hundred eighty-eight".