22149946618 has 4 divisors (see below), whose sum is σ = 33224919930. Its totient is φ = 11074973308.

The previous prime is 22149946603. The next prime is 22149946631. The reversal of 22149946618 is 81664994122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81664994122 = 2 ⋅40832497061.

It can be written as a sum of positive squares in only one way, i.e., 13535693649 + 8614252969 = 116343^2 + 92813^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5537486653 + ... + 5537486656.

Almost surely, 2^22149946618 is an apocalyptic number.

22149946618 is a deficient number, since it is larger than the sum of its proper divisors (11074973312).

22149946618 is a wasteful number, since it uses less digits than its factorization.

22149946618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11074973311.

The product of its digits is 1492992, while the sum is 52.

The spelling of 22149946618 in words is "twenty-two billion, one hundred forty-nine million, nine hundred forty-six thousand, six hundred eighteen".