22638666047 has 4 divisors (see below), whose sum is σ = 22925231520. Its totient is φ = 22352100576.

The previous prime is 22638666013. The next prime is 22638666073. The reversal of 22638666047 is 74066683622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74066683622 = 2 ⋅37033341811.

It is a cyclic number.

It is not a de Polignac number, because 22638666047 - 2¹² = 22638661951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22638665986 and 22638666004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22638666847) 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, 143282618 + ... + 143282775.

It is an arithmetic number, because the mean of its divisors is an integer number (5731307880).

Almost surely, 2^22638666047 is an apocalyptic number.

22638666047 is a deficient number, since it is larger than the sum of its proper divisors (286565473).

22638666047 is an equidigital number, since it uses as much as digits as its factorization.

22638666047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286565472.

The product of its (nonzero) digits is 3483648, while the sum is 50.

The spelling of 22638666047 in words is "twenty-two billion, six hundred thirty-eight million, six hundred sixty-six thousand, forty-seven".