21533421355532 has 6 divisors (see below), whose sum is σ = 37683487372188. Its totient is φ = 10766710677764.

The previous prime is 21533421355529. The next prime is 21533421355603. The reversal of 21533421355532 is 23555312433512.

It is a super-3 number, since 3×21533421355532³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2691677669438 + ... + 2691677669445.

It is an arithmetic number, because the mean of its divisors is an integer number (6280581228698).

Almost surely, 2^{21533421355532} is an apocalyptic number.

It is an amenable number.

21533421355532 is a deficient number, since it is larger than the sum of its proper divisors (16150066016656).

21533421355532 is a wasteful number, since it uses less digits than its factorization.

21533421355532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383355338887 (or 5383355338885 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 44.

The spelling of 21533421355532 in words is "twenty-one trillion, five hundred thirty-three billion, four hundred twenty-one million, three hundred fifty-five thousand, five hundred thirty-two".