22720437289 has 27 divisors (see below), whose sum is σ = 25462325847. Its totient is φ = 20258515200.

The previous prime is 22720437283. The next prime is 22720437317. The reversal of 22720437289 is 98273402722.

The square root of 22720437289 is 150733.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5504898025 + 17215539264 = 74195^2 + 131208^2 .

It is not a de Polignac number, because 22720437289 - 2¹³ = 22720429097 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22720437283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 117722377 + ... + 117722569.

Almost surely, 2^22720437289 is an apocalyptic number.

22720437289 is the 150733-rd square number.

22720437289 is the 75367-th centered octagonal number.

It is an amenable number.

22720437289 is a deficient number, since it is larger than the sum of its proper divisors (2741888558).

22720437289 is an frugal number, since it uses more digits than its factorization.

22720437289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 22720437289 in words is "twenty-two billion, seven hundred twenty million, four hundred thirty-seven thousand, two hundred eighty-nine".