18145199426 has 8 divisors (see below), whose sum is σ = 27850771344. Its totient is φ = 8861608980.

The previous prime is 18145199389. The next prime is 18145199461. The reversal of 18145199426 is 62499154181.

It is a happy number.

18145199426 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105495260 + ... + 105495431.

It is an arithmetic number, because the mean of its divisors is an integer number (3481346418).

Almost surely, 2^18145199426 is an apocalyptic number.

18145199426 is a deficient number, since it is larger than the sum of its proper divisors (9705571918).

18145199426 is a wasteful number, since it uses less digits than its factorization.

18145199426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210990736.

The product of its digits is 622080, while the sum is 50.

The spelling of 18145199426 in words is "eighteen billion, one hundred forty-five million, one hundred ninety-nine thousand, four hundred twenty-six".