18299533258 has 4 divisors (see below), whose sum is σ = 27449299890. Its totient is φ = 9149766628.

The previous prime is 18299533253. The next prime is 18299533267. The reversal of 18299533258 is 85233599281.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85233599281 = 127 ⋅671130703.

It can be written as a sum of positive squares in only one way, i.e., 18283637089 + 15896169 = 135217^2 + 3987^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18299533199 and 18299533208.

It is not an unprimeable number, because it can be changed into a prime (18299533253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4574883313 + ... + 4574883316.

Almost surely, 2^18299533258 is an apocalyptic number.

18299533258 is a deficient number, since it is larger than the sum of its proper divisors (9149766632).

18299533258 is an equidigital number, since it uses as much as digits as its factorization.

18299533258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9149766631.

The product of its digits is 4665600, while the sum is 55.

The spelling of 18299533258 in words is "eighteen billion, two hundred ninety-nine million, five hundred thirty-three thousand, two hundred fifty-eight".