22261637828 has 6 divisors (see below), whose sum is σ = 38957866206. Its totient is φ = 11130818912.

The previous prime is 22261637821. The next prime is 22261637833. The reversal of 22261637828 is 82873616222.

It can be written as a sum of positive squares in only one way, i.e., 15952195204 + 6309442624 = 126302^2 + 79432^2 .

It is not an unprimeable number, because it can be changed into a prime (22261637821) 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 as a sum of consecutive naturals, namely, 2782704725 + ... + 2782704732.

It is an arithmetic number, because the mean of its divisors is an integer number (6492977701).

Almost surely, 2^22261637828 is an apocalyptic number.

It is an amenable number.

22261637828 is a deficient number, since it is larger than the sum of its proper divisors (16696228378).

22261637828 is a wasteful number, since it uses less digits than its factorization.

22261637828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5565409461 (or 5565409459 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The spelling of 22261637828 in words is "twenty-two billion, two hundred sixty-one million, six hundred thirty-seven thousand, eight hundred twenty-eight".