18269159074 has 4 divisors (see below), whose sum is σ = 27403738614. Its totient is φ = 9134579536.

The previous prime is 18269158997. The next prime is 18269159149. The reversal of 18269159074 is 47095196281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47095196281 = 7 ⋅6727885183.

It can be written as a sum of positive squares in only one way, i.e., 18034609849 + 234549225 = 134293^2 + 15315^2 .

It is a super-2 number, since 2×18269159074² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4567289767 + ... + 4567289770.

Almost surely, 2^18269159074 is an apocalyptic number.

18269159074 is a deficient number, since it is larger than the sum of its proper divisors (9134579540).

18269159074 is an equidigital number, since it uses as much as digits as its factorization.

18269159074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134579539.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 18269159074 in words is "eighteen billion, two hundred sixty-nine million, one hundred fifty-nine thousand, seventy-four".