21314433 has 8 divisors (see below), whose sum is σ = 32479168. Its totient is φ = 12179664.

The previous prime is 21314431. The next prime is 21314443. The reversal of 21314433 is 33441312.

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

It is not a de Polignac number, because 21314433 - 2¹ = 21314431 is a prime.

It is a super-2 number, since 2×21314433² = 908610108222978, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1014973 = 21314433 / (2 + 1 + 3 + 1 + 4 + 4 + 3 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21314431) 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 7 ways as a sum of consecutive naturals, for example, 507466 + ... + 507507.

It is an arithmetic number, because the mean of its divisors is an integer number (4059896).

Almost surely, 2^21314433 is an apocalyptic number.

It is an amenable number.

21314433 is a deficient number, since it is larger than the sum of its proper divisors (11164735).

21314433 is a wasteful number, since it uses less digits than its factorization.

21314433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014983.

The product of its digits is 864, while the sum is 21.

The square root of 21314433 is about 4616.7556790456. The cubic root of 21314433 is about 277.2625807954.

Adding to 21314433 its reverse (33441312), we get a palindrome (54755745).

The spelling of 21314433 in words is "twenty-one million, three hundred fourteen thousand, four hundred thirty-three".