21822863556132 has 18 divisors (see below), whose sum is σ = 55163349544758. Its totient is φ = 7274287852032.

The previous prime is 21822863556061. The next prime is 21822863556133. The reversal of 21822863556132 is 23165536822812.

21822863556132 is a `hidden beast` number, since 2 + 1 + 8 + 2 + 2 + 86 + 3 + 556 + 1 + 3 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20546130790656 + 1276732765476 = 4532784^2 + 1129926^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×21822863556132² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21822863556133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 303095327133 + ... + 303095327204.

Almost surely, 2^{21822863556132} is an apocalyptic number.

It is an amenable number.

21822863556132 is an abundant number, since it is smaller than the sum of its proper divisors (33340485988626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21822863556132 is a wasteful number, since it uses less digits than its factorization.

21822863556132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606190654347 (or 606190654342 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 21822863556132 in words is "twenty-one trillion, eight hundred twenty-two billion, eight hundred sixty-three million, five hundred fifty-six thousand, one hundred thirty-two".