18712073743 has 4 divisors (see below), whose sum is σ = 20413171368. Its totient is φ = 17010976120.

The previous prime is 18712073741. The next prime is 18712073789. The reversal of 18712073743 is 34737021781.

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 18712073743 - 2¹ = 18712073741 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 18712073743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18712073741) 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, 850548796 + ... + 850548817.

It is an arithmetic number, because the mean of its divisors is an integer number (5103292842).

Almost surely, 2^18712073743 is an apocalyptic number.

18712073743 is a deficient number, since it is larger than the sum of its proper divisors (1701097625).

18712073743 is a wasteful number, since it uses less digits than its factorization.

18712073743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701097624.

The product of its (nonzero) digits is 197568, while the sum is 43.

The spelling of 18712073743 in words is "eighteen billion, seven hundred twelve million, seventy-three thousand, seven hundred forty-three".