18126058849 has 4 divisors (see below), whose sum is σ = 18126956736. Its totient is φ = 18125160964.

The previous prime is 18126058837. The next prime is 18126058889. The reversal of 18126058849 is 94885062181.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-18126058849 is a prime.

It is a super-2 number, since 2×18126058849² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18126058796 and 18126058805.

It is not an unprimeable number, because it can be changed into a prime (18126058889) 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, 417949 + ... + 459274.

It is an arithmetic number, because the mean of its divisors is an integer number (4531739184).

Almost surely, 2^18126058849 is an apocalyptic number.

It is an amenable number.

18126058849 is a deficient number, since it is larger than the sum of its proper divisors (897887).

18126058849 is an equidigital number, since it uses as much as digits as its factorization.

18126058849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897886.

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 18126058849 in words is "eighteen billion, one hundred twenty-six million, fifty-eight thousand, eight hundred forty-nine".