18701149249 has 4 divisors (see below), whose sum is σ = 19304412160. Its totient is φ = 18097886340.

The previous prime is 18701149211. The next prime is 18701149261. The reversal of 18701149249 is 94294110781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18701149249 - 2⁷ = 18701149121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18701149199 and 18701149208.

It is not an unprimeable number, because it can be changed into a prime (18701149349) 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, 301631409 + ... + 301631470.

It is an arithmetic number, because the mean of its divisors is an integer number (4826103040).

Almost surely, 2^18701149249 is an apocalyptic number.

It is an amenable number.

18701149249 is a deficient number, since it is larger than the sum of its proper divisors (603262911).

18701149249 is an equidigital number, since it uses as much as digits as its factorization.

18701149249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603262910.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 18701149249 in words is "eighteen billion, seven hundred one million, one hundred forty-nine thousand, two hundred forty-nine".