18703242739 has 4 divisors (see below), whose sum is σ = 19208735824. Its totient is φ = 18197749656.

The previous prime is 18703242713. The next prime is 18703242793. The reversal of 18703242739 is 93724230781.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18703242739 - 2¹⁵ = 18703209971 is a prime.

It is a super-2 number, since 2×18703242739² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18703242139) 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, 252746487 + ... + 252746560.

It is an arithmetic number, because the mean of its divisors is an integer number (4802183956).

Almost surely, 2^18703242739 is an apocalyptic number.

18703242739 is a deficient number, since it is larger than the sum of its proper divisors (505493085).

18703242739 is an equidigital number, since it uses as much as digits as its factorization.

18703242739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505493084.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 18703242739 in words is "eighteen billion, seven hundred three million, two hundred forty-two thousand, seven hundred thirty-nine".