18298722254 has 4 divisors (see below), whose sum is σ = 27448083384. Its totient is φ = 9149361126.

The previous prime is 18298722251. The next prime is 18298722263. The reversal of 18298722254 is 45222789281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45222789281 = 154027 ⋅293603.

It is a super-2 number, since 2×18298722254² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18298722251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4574680562 + ... + 4574680565.

It is an arithmetic number, because the mean of its divisors is an integer number (6862020846).

Almost surely, 2^18298722254 is an apocalyptic number.

18298722254 is a deficient number, since it is larger than the sum of its proper divisors (9149361130).

18298722254 is an equidigital number, since it uses as much as digits as its factorization.

18298722254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9149361129.

The product of its digits is 1290240, while the sum is 50.

The spelling of 18298722254 in words is "eighteen billion, two hundred ninety-eight million, seven hundred twenty-two thousand, two hundred fifty-four".