22090919 has 4 divisors (see below), whose sum is σ = 22141680. Its totient is φ = 22040160.

The previous prime is 22090907. The next prime is 22090931. The reversal of 22090919 is 91909022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91909022 = 2 ⋅45954511.

It is an interprime number because it is at equal distance from previous prime (22090907) and next prime (22090931).

It is a cyclic number.

It is not a de Polignac number, because 22090919 - 2¹⁶ = 22025383 is a prime.

It is a super-2 number, since 2×22090919² = 976017404529122, 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 (22090979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24722 + ... + 25599.

It is an arithmetic number, because the mean of its divisors is an integer number (5535420).

Almost surely, 2^22090919 is an apocalyptic number.

22090919 is a deficient number, since it is larger than the sum of its proper divisors (50761).

22090919 is an equidigital number, since it uses as much as digits as its factorization.

22090919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50760.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 22090919 is about 4700.0977649406. The cubic root of 22090919 is about 280.5894004474.

The spelling of 22090919 in words is "twenty-two million, ninety thousand, nine hundred nineteen".