21233042 has 16 divisors (see below), whose sum is σ = 32864832. Its totient is φ = 10280880.

The previous prime is 21233029. The next prime is 21233059. The reversal of 21233042 is 24033212.

It is a self number, because there is not a number n which added to its sum of digits gives 21233042.

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, 18917 + ... + 20007.

It is an arithmetic number, because the mean of its divisors is an integer number (2054052).

Almost surely, 2^21233042 is an apocalyptic number.

21233042 is a deficient number, since it is larger than the sum of its proper divisors (11631790).

21233042 is a wasteful number, since it uses less digits than its factorization.

21233042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393.

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

The square root of 21233042 is about 4607.9325081863. The cubic root of 21233042 is about 276.9092136024.

Adding to 21233042 its reverse (24033212), we get a palindrome (45266254).

The spelling of 21233042 in words is "twenty-one million, two hundred thirty-three thousand, forty-two".