18723329794 has 16 divisors (see below), whose sum is σ = 30278763648. Its totient is φ = 8631998352.

The previous prime is 18723329789. The next prime is 18723329819. The reversal of 18723329794 is 49792332781.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373402 + ... + 420565.

It is an arithmetic number, because the mean of its divisors is an integer number (1892422728).

Almost surely, 2^18723329794 is an apocalyptic number.

18723329794 is a deficient number, since it is larger than the sum of its proper divisors (11555433854).

18723329794 is a wasteful number, since it uses less digits than its factorization.

18723329794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794889.

The product of its digits is 4572288, while the sum is 55.

The spelling of 18723329794 in words is "eighteen billion, seven hundred twenty-three million, three hundred twenty-nine thousand, seven hundred ninety-four".