18454693723 has 16 divisors (see below), whose sum is σ = 19748634624. Its totient is φ = 17184666240.

The previous prime is 18454693687. The next prime is 18454693727. The reversal of 18454693723 is 32739645481.

It is a happy number.

It is not a de Polignac number, because 18454693723 - 2¹³ = 18454685531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18454693727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780708 + ... + 803998.

It is an arithmetic number, because the mean of its divisors is an integer number (1234289664).

Almost surely, 2^18454693723 is an apocalyptic number.

18454693723 is a deficient number, since it is larger than the sum of its proper divisors (1293940901).

18454693723 is a wasteful number, since it uses less digits than its factorization.

18454693723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23802.

The product of its digits is 4354560, while the sum is 52.

The spelling of 18454693723 in words is "eighteen billion, four hundred fifty-four million, six hundred ninety-three thousand, seven hundred twenty-three".