16995989803 has 8 divisors (see below), whose sum is σ = 18411680000. Its totient is φ = 15688603944.

The previous prime is 16995989767. The next prime is 16995989807. The reversal of 16995989803 is 30898959961.

It is not a de Polignac number, because 16995989803 - 2²¹ = 16993892651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16995989807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3865803 + ... + 3870196.

It is an arithmetic number, because the mean of its divisors is an integer number (2301460000).

Almost surely, 2^16995989803 is an apocalyptic number.

16995989803 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16995989803 is a deficient number, since it is larger than the sum of its proper divisors (1415690197).

16995989803 is an frugal number, since it uses more digits than its factorization.

16995989803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7736038 (or 7736012 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 67.

The spelling of 16995989803 in words is "sixteen billion, nine hundred ninety-five million, nine hundred eighty-nine thousand, eight hundred three".