22494394618 has 4 divisors (see below), whose sum is σ = 33741591930. Its totient is φ = 11247197308.

The previous prime is 22494394613. The next prime is 22494394619. The reversal of 22494394618 is 81649349422.

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

It can be written as a sum of positive squares in only one way, i.e., 21835086289 + 659308329 = 147767^2 + 25677^2 .

It is not an unprimeable number, because it can be changed into a prime (22494394613) by changing a digit.

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, 5623598653 + ... + 5623598656.

Almost surely, 2^22494394618 is an apocalyptic number.

22494394618 is a deficient number, since it is larger than the sum of its proper divisors (11247197312).

22494394618 is a wasteful number, since it uses less digits than its factorization.

22494394618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11247197311.

The product of its digits is 2985984, while the sum is 52.

The spelling of 22494394618 in words is "twenty-two billion, four hundred ninety-four million, three hundred ninety-four thousand, six hundred eighteen".