22891636709 has 4 divisors (see below), whose sum is σ = 22895439660. Its totient is φ = 22887833760.

The previous prime is 22891636699. The next prime is 22891636727. The reversal of 22891636709 is 90763619822.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15580531684 + 7311105025 = 124822^2 + 85505^2 .

It is a cyclic number.

It is not a de Polignac number, because 22891636709 - 2¹² = 22891632613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22891636109) 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 in 3 ways as a sum of consecutive naturals, for example, 1892432 + ... + 1904489.

It is an arithmetic number, because the mean of its divisors is an integer number (5723859915).

Almost surely, 2^22891636709 is an apocalyptic number.

It is an amenable number.

22891636709 is a deficient number, since it is larger than the sum of its proper divisors (3802951).

22891636709 is an equidigital number, since it uses as much as digits as its factorization.

22891636709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802950.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 22891636709 in words is "twenty-two billion, eight hundred ninety-one million, six hundred thirty-six thousand, seven hundred nine".