16890685423 has 2 divisors, whose sum is σ = 16890685424. Its totient is φ = 16890685422.

The previous prime is 16890685373. The next prime is 16890685433. The reversal of 16890685423 is 32458609861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16890685423 - 2⁹ = 16890684911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16890685433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8445342711 + 8445342712.

It is an arithmetic number, because the mean of its divisors is an integer number (8445342712).

Almost surely, 2^16890685423 is an apocalyptic number.

16890685423 is a deficient number, since it is larger than the sum of its proper divisors (1).

16890685423 is an equidigital number, since it uses as much as digits as its factorization.

16890685423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 16890685423 in words is "sixteen billion, eight hundred ninety million, six hundred eighty-five thousand, four hundred twenty-three".