18463801403 has 4 divisors (see below), whose sum is σ = 19100484240. Its totient is φ = 17827118568.

The previous prime is 18463801393. The next prime is 18463801417. The reversal of 18463801403 is 30410836481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30410836481 = 2053 ⋅14812877.

It is a cyclic number.

It is not a de Polignac number, because 18463801403 - 2⁴ = 18463801387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18463800403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318341375 + ... + 318341432.

It is an arithmetic number, because the mean of its divisors is an integer number (4775121060).

Almost surely, 2^18463801403 is an apocalyptic number.

18463801403 is a deficient number, since it is larger than the sum of its proper divisors (636682837).

18463801403 is an equidigital number, since it uses as much as digits as its factorization.

18463801403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636682836.

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 18463801403 in words is "eighteen billion, four hundred sixty-three million, eight hundred one thousand, four hundred three".