16641918803 has 4 divisors (see below), whose sum is σ = 16646397360. Its totient is φ = 16637440248.

The previous prime is 16641918791. The next prime is 16641918809. The reversal of 16641918803 is 30881914661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16641918803 is a prime.

It is a super-2 number, since 2×16641918803² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16641918809) 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, 2233700 + ... + 2241137.

It is an arithmetic number, because the mean of its divisors is an integer number (4161599340).

Almost surely, 2^16641918803 is an apocalyptic number.

16641918803 is a deficient number, since it is larger than the sum of its proper divisors (4478557).

16641918803 is an equidigital number, since it uses as much as digits as its factorization.

16641918803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4478556.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 16641918803 in words is "sixteen billion, six hundred forty-one million, nine hundred eighteen thousand, eight hundred three".