22220787 has 4 divisors (see below), whose sum is σ = 29627720. Its totient is φ = 14813856.

The previous prime is 22220777. The next prime is 22220791. The reversal of 22220787 is 78702222.

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

It is not a de Polignac number, because 22220787 - 2⁴ = 22220771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22220777) 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, 3703462 + ... + 3703467.

It is an arithmetic number, because the mean of its divisors is an integer number (7406930).

Almost surely, 2^22220787 is an apocalyptic number.

22220787 is a deficient number, since it is larger than the sum of its proper divisors (7406933).

22220787 is an equidigital number, since it uses as much as digits as its factorization.

22220787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7406932.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 22220787 is about 4713.8929771474. The cubic root of 22220787 is about 281.1381690704.

The spelling of 22220787 in words is "twenty-two million, two hundred twenty thousand, seven hundred eighty-seven".