20160919 has 4 divisors (see below), whose sum is σ = 21222040. Its totient is φ = 19099800.

The previous prime is 20160871. The next prime is 20160923. The reversal of 20160919 is 91906102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91906102 = 2 ⋅45953051.

It is a cyclic number.

It is not a de Polignac number, because 20160919 - 2¹¹ = 20158871 is a prime.

It is a super-2 number, since 2×20160919² = 812925309849122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20160319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530532 + ... + 530569.

It is an arithmetic number, because the mean of its divisors is an integer number (5305510).

Almost surely, 2^20160919 is an apocalyptic number.

20160919 is a deficient number, since it is larger than the sum of its proper divisors (1061121).

20160919 is a wasteful number, since it uses less digits than its factorization.

20160919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061120.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 20160919 is about 4490.0912017464. The cubic root of 20160919 is about 272.1678201313.

The spelling of 20160919 in words is "twenty million, one hundred sixty thousand, nine hundred nineteen".