22755420647 has 4 divisors (see below), whose sum is σ = 23284616520. Its totient is φ = 22226224776.

The previous prime is 22755420557. The next prime is 22755420683. The reversal of 22755420647 is 74602455722.

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

It is a cyclic number.

It is not a de Polignac number, because 22755420647 - 2¹⁰ = 22755419623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22755420598 and 22755420607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22755420697) 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 3 ways as a sum of consecutive naturals, for example, 264597872 + ... + 264597957.

It is an arithmetic number, because the mean of its divisors is an integer number (5821154130).

Almost surely, 2^22755420647 is an apocalyptic number.

22755420647 is a deficient number, since it is larger than the sum of its proper divisors (529195873).

22755420647 is an equidigital number, since it uses as much as digits as its factorization.

22755420647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529195872.

The product of its (nonzero) digits is 940800, while the sum is 44.

The spelling of 22755420647 in words is "twenty-two billion, seven hundred fifty-five million, four hundred twenty thousand, six hundred forty-seven".