21043332032524 has 6 divisors (see below), whose sum is σ = 36825831056924. Its totient is φ = 10521666016260.

The previous prime is 21043332032441. The next prime is 21043332032551. The reversal of 21043332032524 is 42523023334012.

It is a self number, because there is not a number n which added to its sum of digits gives 21043332032524.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2630416504062 + ... + 2630416504069.

Almost surely, 2^{21043332032524} is an apocalyptic number.

It is an amenable number.

21043332032524 is a deficient number, since it is larger than the sum of its proper divisors (15782499024400).

21043332032524 is a wasteful number, since it uses less digits than its factorization.

21043332032524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5260833008135 (or 5260833008133 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 34.

Adding to 21043332032524 its reverse (42523023334012), we get a palindrome (63566355366536).

The spelling of 21043332032524 in words is "twenty-one trillion, forty-three billion, three hundred thirty-two million, thirty-two thousand, five hundred twenty-four".