18042780723 has 8 divisors (see below), whose sum is σ = 26244044736. Its totient is φ = 10935018600.

The previous prime is 18042780719. The next prime is 18042780739. The reversal of 18042780723 is 32708724081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18042780723 - 2² = 18042780719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18042780023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273375433 + ... + 273375498.

It is an arithmetic number, because the mean of its divisors is an integer number (3280505592).

Almost surely, 2^18042780723 is an apocalyptic number.

18042780723 is a deficient number, since it is larger than the sum of its proper divisors (8201264013).

18042780723 is a wasteful number, since it uses less digits than its factorization.

18042780723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546750945.

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 18042780723 in words is "eighteen billion, forty-two million, seven hundred eighty thousand, seven hundred twenty-three".