21552326433 has 96 divisors (see below), whose sum is σ = 36549676800. Its totient is φ = 12105054720.

The previous prime is 21552326417. The next prime is 21552326437. The reversal of 21552326433 is 33462325512.

21552326433 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 2 + 3 + 2 + 643 + 3 = 666.

It is not a de Polignac number, because 21552326433 - 2⁴ = 21552326417 is a prime.

It is a super-3 number, since 3×21552326433³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21552326437) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29402535 + ... + 29403267.

It is an arithmetic number, because the mean of its divisors is an integer number (380725800).

Almost surely, 2^21552326433 is an apocalyptic number.

21552326433 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21552326433 is a deficient number, since it is larger than the sum of its proper divisors (14997350367).

21552326433 is a wasteful number, since it uses less digits than its factorization.

21552326433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1156 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

The spelling of 21552326433 in words is "twenty-one billion, five hundred fifty-two million, three hundred twenty-six thousand, four hundred thirty-three".