18384740034049 has 3 divisors (see below), whose sum is σ = 18384744321793. Its totient is φ = 18384735746306.

The previous prime is 18384740034007. The next prime is 18384740034053. The reversal of 18384740034049 is 94043004748381.

The square root of 18384740034049 is 4287743.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 18384740034049 - 2³⁷ = 18247301080577 is a prime.

It is a super-2 number, since 2×18384740034049² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18384740034149) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2143872 + ... + 6431614.

Almost surely, 2^{18384740034049} is an apocalyptic number.

18384740034049 is the 4287743-rd square number.

18384740034049 is the 2143872-nd centered octagonal number.

It is an amenable number.

18384740034049 is a deficient number, since it is larger than the sum of its proper divisors (4287744).

18384740034049 is an frugal number, since it uses more digits than its factorization.

18384740034049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8575486 (or 4287743 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 18384740034049 in words is "eighteen trillion, three hundred eighty-four billion, seven hundred forty million, thirty-four thousand, forty-nine".