22280618 has 4 divisors (see below), whose sum is σ = 33420930. Its totient is φ = 11140308.

The previous prime is 22280569. The next prime is 22280627. The reversal of 22280618 is 81608222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81608222 = 2 ⋅40804111.

It can be written as a sum of positive squares in only one way, i.e., 22118209 + 162409 = 4703^2 + 403^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5570153 + ... + 5570156.

Almost surely, 2^22280618 is an apocalyptic number.

22280618 is a deficient number, since it is larger than the sum of its proper divisors (11140312).

22280618 is a wasteful number, since it uses less digits than its factorization.

22280618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11140311.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 22280618 is about 4720.2349517794. The cubic root of 22280618 is about 281.3902709019.

The spelling of 22280618 in words is "twenty-two million, two hundred eighty thousand, six hundred eighteen".