21861063333 has 24 divisors (see below), whose sum is σ = 32031810200. Its totient is φ = 14364449280.

The previous prime is 21861063319. The next prime is 21861063349. The reversal of 21861063333 is 33336016812.

21861063333 is a `hidden beast` number, since 2 + 1 + 8 + 6 + 10 + 633 + 3 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4318855524 + 17542207809 = 65718^2 + 132447^2 .

It is not a de Polignac number, because 21861063333 - 2⁶ = 21861063269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21861065333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1006953 + ... + 1028433.

Almost surely, 2^21861063333 is an apocalyptic number.

It is an amenable number.

21861063333 is a deficient number, since it is larger than the sum of its proper divisors (10170746867).

21861063333 is a wasteful number, since it uses less digits than its factorization.

21861063333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23109 (or 23106 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 21861063333 in words is "twenty-one billion, eight hundred sixty-one million, sixty-three thousand, three hundred thirty-three".