21060433 has 16 divisors (see below), whose sum is σ = 23677056. Its totient is φ = 18627840.

The previous prime is 21060421. The next prime is 21060449. The reversal of 21060433 is 33406012.

It is a cyclic number.

It is not a de Polignac number, because 21060433 - 2⁵ = 21060401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21060433.

It is not an unprimeable number, because it can be changed into a prime (21061433) 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 15 ways as a sum of consecutive naturals, for example, 23410 + ... + 24292.

It is an arithmetic number, because the mean of its divisors is an integer number (1479816).

Almost surely, 2^21060433 is an apocalyptic number.

21060433 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21060433 is a deficient number, since it is larger than the sum of its proper divisors (2616623).

21060433 is a wasteful number, since it uses less digits than its factorization.

21060433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 21060433 is about 4589.1647388169. The cubic root of 21060433 is about 276.1568150722.

Adding to 21060433 its reverse (33406012), we get a palindrome (54466445).

The spelling of 21060433 in words is "twenty-one million, sixty thousand, four hundred thirty-three".