18124099649 has 4 divisors (see below), whose sum is σ = 18126323760. Its totient is φ = 18121875540.

The previous prime is 18124099633. The next prime is 18124099661. The reversal of 18124099649 is 94699042181.

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 18124099649 - 2⁴ = 18124099633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18124099649.

It is not an unprimeable number, because it can be changed into a prime (18124099249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099787 + ... + 1116144.

It is an arithmetic number, because the mean of its divisors is an integer number (4531580940).

Almost surely, 2^18124099649 is an apocalyptic number.

It is an amenable number.

18124099649 is a deficient number, since it is larger than the sum of its proper divisors (2224111).

18124099649 is an equidigital number, since it uses as much as digits as its factorization.

18124099649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224110.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 18124099649 in words is "eighteen billion, one hundred twenty-four million, ninety-nine thousand, six hundred forty-nine".