21433036 has 12 divisors (see below), whose sum is σ = 37703512. Its totient is φ = 10660608.

The previous prime is 21432991. The next prime is 21433051. The reversal of 21433036 is 63033412.

It is a junction number, because it is equal to n+sod(n) for n = 21432998 and 21433016.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13110 + ... + 14653.

Almost surely, 2^21433036 is an apocalyptic number.

It is an amenable number.

21433036 is a deficient number, since it is larger than the sum of its proper divisors (16270476).

21433036 is a wasteful number, since it uses less digits than its factorization.

21433036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27960 (or 27958 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 21433036 is about 4629.5827025770. The cubic root of 21433036 is about 277.7759006925.

Adding to 21433036 its reverse (63033412), we get a palindrome (84466448).

The spelling of 21433036 in words is "twenty-one million, four hundred thirty-three thousand, thirty-six".