22020187 has 4 divisors (see below), whose sum is σ = 25165936. Its totient is φ = 18874440.

The previous prime is 22020181. The next prime is 22020191. The reversal of 22020187 is 78102022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22020187 - 2⁷ = 22020059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22020181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1572864 + ... + 1572877.

It is an arithmetic number, because the mean of its divisors is an integer number (6291484).

Almost surely, 2^22020187 is an apocalyptic number.

22020187 is a deficient number, since it is larger than the sum of its proper divisors (3145749).

22020187 is an equidigital number, since it uses as much as digits as its factorization.

22020187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145748.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 22020187 is about 4692.5672078298. The cubic root of 22020187 is about 280.2896110590.

The spelling of 22020187 in words is "twenty-two million, twenty thousand, one hundred eighty-seven".