21552203268 has 36 divisors (see below), whose sum is σ = 56847842688. Its totient is φ = 6871716720.

The previous prime is 21552203263. The next prime is 21552203303. The reversal of 21552203268 is 86230225512.

It is a happy number.

21552203268 is a `hidden beast` number, since 21 + 552 + 20 + 3 + 2 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×21552203268³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21552203261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13013788 + ... + 13015443.

Almost surely, 2^21552203268 is an apocalyptic number.

It is an amenable number.

21552203268 is an abundant number, since it is smaller than the sum of its proper divisors (35295639420).

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

21552203268 is a wasteful number, since it uses less digits than its factorization.

21552203268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26029264 (or 26029259 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 21552203268 in words is "twenty-one billion, five hundred fifty-two million, two hundred three thousand, two hundred sixty-eight".