16990425943 has 4 divisors (see below), whose sum is σ = 17044708768. Its totient is φ = 16936143120.

The previous prime is 16990425931. The next prime is 16990425961. The reversal of 16990425943 is 34952409961.

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 16990425943 - 2²⁵ = 16956871511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16990425143) 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, 27140943 + ... + 27141568.

It is an arithmetic number, because the mean of its divisors is an integer number (4261177192).

Almost surely, 2^16990425943 is an apocalyptic number.

16990425943 is a deficient number, since it is larger than the sum of its proper divisors (54282825).

16990425943 is an equidigital number, since it uses as much as digits as its factorization.

16990425943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54282824.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 16990425943 in words is "sixteen billion, nine hundred ninety million, four hundred twenty-five thousand, nine hundred forty-three".