18597998412 has 72 divisors (see below), whose sum is σ = 56089217520. Its totient is φ = 5313712320.

The previous prime is 18597998357. The next prime is 18597998417. The reversal of 18597998412 is 21489979581.

18597998412 is a `hidden beast` number, since 18 + 59 + 79 + 98 + 412 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 18597998412.

It is not an unprimeable number, because it can be changed into a prime (18597998417) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1751889 + ... + 1762472.

It is an arithmetic number, because the mean of its divisors is an integer number (779016910).

Almost surely, 2^18597998412 is an apocalyptic number.

18597998412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18597998412 is an abundant number, since it is smaller than the sum of its proper divisors (37491219108).

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

18597998412 is a wasteful number, since it uses less digits than its factorization.

18597998412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3514388 (or 3514373 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 63.

The spelling of 18597998412 in words is "eighteen billion, five hundred ninety-seven million, nine hundred ninety-eight thousand, four hundred twelve".