18513862038000 has 400 divisors, whose sum is σ = 76426794485184. Its totient is φ = 4231739635200.

The previous prime is 18513862037981. The next prime is 18513862038013. The reversal of 18513862038000 is 83026831581.

18513862038000 is a `hidden beast` number, since 1 + 8 + 5 + 13 + 8 + 620 + 3 + 8 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7029079 + ... + 9297078.

Almost surely, 2^{18513862038000} is an apocalyptic number.

18513862038000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18513862038000 is an abundant number, since it is smaller than the sum of its proper divisors (57912932447184).

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

18513862038000 is a wasteful number, since it uses less digits than its factorization.

18513862038000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16326199 (or 16326174 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

Adding to 18513862038000 its reverse (83026831581), we get a palindrome (18596888869581).

The spelling of 18513862038000 in words is "eighteen trillion, five hundred thirteen billion, eight hundred sixty-two million, thirty-eight thousand".