18242723701 has 4 divisors (see below), whose sum is σ = 18251466912. Its totient is φ = 18233980492.

The previous prime is 18242723699. The next prime is 18242723743. The reversal of 18242723701 is 10732724281.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10732724281 = 78517 ⋅136693.

It is a cyclic number.

It is not a de Polignac number, because 18242723701 - 2¹ = 18242723699 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18242523701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4368475 + ... + 4372648.

It is an arithmetic number, because the mean of its divisors is an integer number (4562866728).

Almost surely, 2^18242723701 is an apocalyptic number.

It is an amenable number.

18242723701 is a deficient number, since it is larger than the sum of its proper divisors (8743211).

18242723701 is an equidigital number, since it uses as much as digits as its factorization.

18242723701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8743210.

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 18242723701 in words is "eighteen billion, two hundred forty-two million, seven hundred twenty-three thousand, seven hundred one".