18203794401 has 8 divisors (see below), whose sum is σ = 26138781760. Its totient is φ = 11202334992.

The previous prime is 18203794393. The next prime is 18203794439. The reversal of 18203794401 is 10449730281.

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

It is not a de Polignac number, because 18203794401 - 2³ = 18203794393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 466763959 = 18203794401 / (1 + 8 + 2 + 0 + 3 + 7 + 9 + 4 + 4 + 0 + 1).

It is a self number, because there is not a number n which added to its sum of digits gives 18203794401.

It is not an unprimeable number, because it can be changed into a prime (18203794901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233381941 + ... + 233382018.

It is an arithmetic number, because the mean of its divisors is an integer number (3267347720).

Almost surely, 2^18203794401 is an apocalyptic number.

It is an amenable number.

18203794401 is a deficient number, since it is larger than the sum of its proper divisors (7934987359).

18203794401 is a wasteful number, since it uses less digits than its factorization.

18203794401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466763975.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 18203794401 in words is "eighteen billion, two hundred three million, seven hundred ninety-four thousand, four hundred one".