18740944751 has 4 divisors (see below), whose sum is σ = 18744125472. Its totient is φ = 18737764032.

The previous prime is 18740944699. The next prime is 18740944763. The reversal of 18740944751 is 15744904781.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18740944751 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 18740944751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18740944351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1581506 + ... + 1593311.

It is an arithmetic number, because the mean of its divisors is an integer number (4686031368).

Almost surely, 2^18740944751 is an apocalyptic number.

18740944751 is a deficient number, since it is larger than the sum of its proper divisors (3180721).

18740944751 is an equidigital number, since it uses as much as digits as its factorization.

18740944751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180720.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 18740944751 in words is "eighteen billion, seven hundred forty million, nine hundred forty-four thousand, seven hundred fifty-one".