18403345476 has 42 divisors (see below), whose sum is σ = 48286700462. Its totient is φ = 6134447520.

The previous prime is 18403345469. The next prime is 18403345487. The reversal of 18403345476 is 67454330481.

It can be written as a sum of positive squares in only one way, i.e., 15225092100 + 3178253376 = 123390^2 + 56376^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 3152665 + ... + 3158496.

Almost surely, 2^18403345476 is an apocalyptic number.

It is an amenable number.

18403345476 is an abundant number, since it is smaller than the sum of its proper divisors (29883354986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18403345476 is an equidigital number, since it uses as much as digits as its factorization.

18403345476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6311183 (or 6311166 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 18403345476 in words is "eighteen billion, four hundred three million, three hundred forty-five thousand, four hundred seventy-six".