16408402003 has 12 divisors (see below), whose sum is σ = 19091357472. Its totient is φ = 14061373200.

The previous prime is 16408401991. The next prime is 16408402027. The reversal of 16408402003 is 30020480461.

It is not a de Polignac number, because 16408402003 - 2⁹ = 16408401491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16408402093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217126 + ... + 282772.

It is an arithmetic number, because the mean of its divisors is an integer number (1590946456).

Almost surely, 2^16408402003 is an apocalyptic number.

16408402003 is a deficient number, since it is larger than the sum of its proper divisors (2682955469).

16408402003 is an equidigital number, since it uses as much as digits as its factorization.

16408402003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70762 (or 70755 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 16408402003 its reverse (30020480461), we get a palindrome (46428882464).

The spelling of 16408402003 in words is "sixteen billion, four hundred eight million, four hundred two thousand, three".