18043747297 has 4 divisors (see below), whose sum is σ = 18151793856. Its totient is φ = 17935700740.

The previous prime is 18043747279. The next prime is 18043747321. The reversal of 18043747297 is 79274734081.

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 not a de Polignac number, because 18043747297 - 2¹⁵ = 18043714529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18043744297) 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, 54023029 + ... + 54023362.

It is an arithmetic number, because the mean of its divisors is an integer number (4537948464).

Almost surely, 2^18043747297 is an apocalyptic number.

It is an amenable number.

18043747297 is a deficient number, since it is larger than the sum of its proper divisors (108046559).

18043747297 is a wasteful number, since it uses less digits than its factorization.

18043747297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108046558.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 18043747297 in words is "eighteen billion, forty-three million, seven hundred forty-seven thousand, two hundred ninety-seven".