18189301346 has 4 divisors (see below), whose sum is σ = 27283952022. Its totient is φ = 9094650672.

The previous prime is 18189301327. The next prime is 18189301357. The reversal of 18189301346 is 64310398181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64310398181 = 19 ⋅3384757799.

It can be written as a sum of positive squares in only one way, i.e., 11451354121 + 6737947225 = 107011^2 + 82085^2 .

It is a super-4 number, since 4×18189301346⁴ (a number of 42 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18189301297 and 18189301306.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4547325335 + ... + 4547325338.

Almost surely, 2^18189301346 is an apocalyptic number.

18189301346 is a deficient number, since it is larger than the sum of its proper divisors (9094650676).

18189301346 is an equidigital number, since it uses as much as digits as its factorization.

18189301346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9094650675.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 18189301346 in words is "eighteen billion, one hundred eighty-nine million, three hundred one thousand, three hundred forty-six".