18398224137 has 16 divisors (see below), whose sum is σ = 25354459712. Its totient is φ = 11857959360.

The previous prime is 18398224121. The next prime is 18398224157. The reversal of 18398224137 is 73142289381.

It is a happy number.

It is not a de Polignac number, because 18398224137 - 2⁴ = 18398224121 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18398224157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510439 + ... + 545292.

It is an arithmetic number, because the mean of its divisors is an integer number (1584653732).

Almost surely, 2^18398224137 is an apocalyptic number.

It is an amenable number.

18398224137 is a deficient number, since it is larger than the sum of its proper divisors (6956235575).

18398224137 is a wasteful number, since it uses less digits than its factorization.

18398224137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055928.

The product of its digits is 580608, while the sum is 48.

The spelling of 18398224137 in words is "eighteen billion, three hundred ninety-eight million, two hundred twenty-four thousand, one hundred thirty-seven".