18604956723 has 16 divisors (see below), whose sum is σ = 26297187840. Its totient is φ = 11659757696.

The previous prime is 18604956709. The next prime is 18604956739. The reversal of 18604956723 is 32765940681.

It is a cyclic number.

It is not a de Polignac number, because 18604956723 - 2⁶ = 18604956659 is a prime.

It is a super-2 number, since 2×18604956723² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (18604956823) 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, 174615 + ... + 260192.

It is an arithmetic number, because the mean of its divisors is an integer number (1643574240).

It is a 1-persistent number, because it is pandigital, but 2⋅18604956723 = 37209913446 is not.

Almost surely, 2^18604956723 is an apocalyptic number.

18604956723 is a deficient number, since it is larger than the sum of its proper divisors (7692231117).

18604956723 is a wasteful number, since it uses less digits than its factorization.

18604956723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435666.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 18604956723 in words is "eighteen billion, six hundred four million, nine hundred fifty-six thousand, seven hundred twenty-three".