22019427 has 6 divisors (see below), whose sum is σ = 31805852. Its totient is φ = 14679612.

The previous prime is 22019411. The next prime is 22019429. The reversal of 22019427 is 72491022.

22019427 is a `hidden beast` number, since 220 + 19 + 427 = 666.

It is not a de Polignac number, because 22019427 - 2⁴ = 22019411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22019427.

It is not an unprimeable number, because it can be changed into a prime (22019429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1223293 + ... + 1223310.

Almost surely, 2^22019427 is an apocalyptic number.

22019427 is a deficient number, since it is larger than the sum of its proper divisors (9786425).

22019427 is a wasteful number, since it uses less digits than its factorization.

22019427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446609 (or 2446606 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 22019427 is about 4692.4862280032. The cubic root of 22019427 is about 280.2863864034.

It can be divided in two parts, 2201 and 9427, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 22019427 in words is "twenty-two million, nineteen thousand, four hundred twenty-seven".