16431294403 has 4 divisors (see below), whose sum is σ = 16435156680. Its totient is φ = 16427432128.

The previous prime is 16431294391. The next prime is 16431294433. The reversal of 16431294403 is 30449213461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16431294403 - 2⁹ = 16431293891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16431294433) 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 3 ways as a sum of consecutive naturals, for example, 1924750 + ... + 1933267.

It is an arithmetic number, because the mean of its divisors is an integer number (4108789170).

Almost surely, 2^16431294403 is an apocalyptic number.

16431294403 is a deficient number, since it is larger than the sum of its proper divisors (3862277).

16431294403 is an equidigital number, since it uses as much as digits as its factorization.

16431294403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3862276.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 16431294403 in words is "sixteen billion, four hundred thirty-one million, two hundred ninety-four thousand, four hundred three".