18398347072 has 56 divisors (see below), whose sum is σ = 42512138496. Its totient is φ = 7736222208.

The previous prime is 18398347061. The next prime is 18398347073. The reversal of 18398347072 is 27074389381.

It is a tau number, because it is divible by the number of its divisors (56).

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18398347073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363688 + ... + 411175.

Almost surely, 2^18398347072 is an apocalyptic number.

It is an amenable number.

18398347072 is an abundant number, since it is smaller than the sum of its proper divisors (24113791424).

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

18398347072 is an equidigital number, since it uses as much as digits as its factorization.

18398347072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774935 (or 774925 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 18398347072 in words is "eighteen billion, three hundred ninety-eight million, three hundred forty-seven thousand, seventy-two".