22739643898 has 4 divisors (see below), whose sum is σ = 34109465850. Its totient is φ = 11369821948.

The previous prime is 22739643893. The next prime is 22739643911. The reversal of 22739643898 is 89834693722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89834693722 = 2 ⋅44917346861.

It can be written as a sum of positive squares in only one way, i.e., 21731771889 + 1007872009 = 147417^2 + 31747^2 .

It is not an unprimeable number, because it can be changed into a prime (22739643893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5684910973 + ... + 5684910976.

Almost surely, 2^22739643898 is an apocalyptic number.

22739643898 is a deficient number, since it is larger than the sum of its proper divisors (11369821952).

22739643898 is a wasteful number, since it uses less digits than its factorization.

22739643898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11369821951.

The product of its digits is 31352832, while the sum is 61.

The spelling of 22739643898 in words is "twenty-two billion, seven hundred thirty-nine million, six hundred forty-three thousand, eight hundred ninety-eight".