18258731146 has 8 divisors (see below), whose sum is σ = 28056099204. Its totient is φ = 8906698080.

The previous prime is 18258731123. The next prime is 18258731147. The reversal of 18258731146 is 64113785281.

It can be written as a sum of positive squares in 2 ways, for example, as 18045892225 + 212838921 = 134335^2 + 14589^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18258731096 and 18258731105.

It is not an unprimeable number, because it can be changed into a prime (18258731147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111333645 + ... + 111333808.

Almost surely, 2^18258731146 is an apocalyptic number.

18258731146 is a deficient number, since it is larger than the sum of its proper divisors (9797368058).

18258731146 is a wasteful number, since it uses less digits than its factorization.

18258731146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222667496.

The product of its digits is 322560, while the sum is 46.

The spelling of 18258731146 in words is "eighteen billion, two hundred fifty-eight million, seven hundred thirty-one thousand, one hundred forty-six".