21332042 has 16 divisors (see below), whose sum is σ = 34670592. Its totient is φ = 9804480.

The previous prime is 21332029. The next prime is 21332053. The reversal of 21332042 is 24023312.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 21332042.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5834 + ... + 8757.

It is an arithmetic number, because the mean of its divisors is an integer number (2166912).

Almost surely, 2^21332042 is an apocalyptic number.

21332042 is a deficient number, since it is larger than the sum of its proper divisors (13338550).

21332042 is a wasteful number, since it uses less digits than its factorization.

21332042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14653.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 21332042 is about 4618.6623604676. The cubic root of 21332042 is about 277.3389136241.

Adding to 21332042 its reverse (24023312), we get a palindrome (45355354).

The spelling of 21332042 in words is "twenty-one million, three hundred thirty-two thousand, forty-two".