16905219069 has 4 divisors (see below), whose sum is σ = 22540292096. Its totient is φ = 11270146044.

The previous prime is 16905219061. The next prime is 16905219103. The reversal of 16905219069 is 96091250961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16905219069 - 2³ = 16905219061 is a prime.

It is a super-2 number, since 2×16905219069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16905219061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2817536509 + ... + 2817536514.

It is an arithmetic number, because the mean of its divisors is an integer number (5635073024).

Almost surely, 2^16905219069 is an apocalyptic number.

It is an amenable number.

16905219069 is a deficient number, since it is larger than the sum of its proper divisors (5635073027).

16905219069 is an equidigital number, since it uses as much as digits as its factorization.

16905219069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5635073026.

The product of its (nonzero) digits is 262440, while the sum is 48.

The spelling of 16905219069 in words is "sixteen billion, nine hundred five million, two hundred nineteen thousand, sixty-nine".