22618224857 has 4 divisors (see below), whose sum is σ = 22619720676. Its totient is φ = 22616729040.

The previous prime is 22618224851. The next prime is 22618224877. The reversal of 22618224857 is 75842281622.

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 1501485001 + 21116739856 = 38749^2 + 145316^2 .

It is a cyclic number.

It is not a de Polignac number, because 22618224857 - 2⁴ = 22618224841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22618224851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724994 + ... + 755547.

It is an arithmetic number, because the mean of its divisors is an integer number (5654930169).

Almost surely, 2^22618224857 is an apocalyptic number.

It is an amenable number.

22618224857 is a deficient number, since it is larger than the sum of its proper divisors (1495819).

22618224857 is a wasteful number, since it uses less digits than its factorization.

22618224857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495818.

The product of its digits is 860160, while the sum is 47.

The spelling of 22618224857 in words is "twenty-two billion, six hundred eighteen million, two hundred twenty-four thousand, eight hundred fifty-seven".