21022433 has 8 divisors (see below), whose sum is σ = 21805056. Its totient is φ = 20246400.

The previous prime is 21022427. The next prime is 21022447. The reversal of 21022433 is 33422012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21022433 - 2²⁴ = 4245217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5393 + ... + 8433.

It is an arithmetic number, because the mean of its divisors is an integer number (2725632).

Almost surely, 2^21022433 is an apocalyptic number.

It is an amenable number.

21022433 is a deficient number, since it is larger than the sum of its proper divisors (782623).

21022433 is a wasteful number, since it uses less digits than its factorization.

21022433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295.

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

The square root of 21022433 is about 4585.0226826047. The cubic root of 21022433 is about 275.9906222747.

Adding to 21022433 its reverse (33422012), we get a palindrome (54444445).

The spelling of 21022433 in words is "twenty-one million, twenty-two thousand, four hundred thirty-three".