18397241154 has 80 divisors (see below), whose sum is σ = 42728875200. Its totient is φ = 5909301216.

The previous prime is 18397241119. The next prime is 18397241189. The reversal of 18397241154 is 45114279381.

18397241154 is a `hidden beast` number, since 1 + 8 + 397 + 241 + 15 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (18397241119) and next prime (18397241189).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2566227 + ... + 2573385.

It is an arithmetic number, because the mean of its divisors is an integer number (534110940).

Almost surely, 2^18397241154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18397241154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21364437600).

18397241154 is an abundant number, since it is smaller than the sum of its proper divisors (24331634046).

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

18397241154 is a wasteful number, since it uses less digits than its factorization.

18397241154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7749 (or 7740 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The spelling of 18397241154 in words is "eighteen billion, three hundred ninety-seven million, two hundred forty-one thousand, one hundred fifty-four".