21201433 has 8 divisors (see below), whose sum is σ = 23306976. Its totient is φ = 19125600.

The previous prime is 21201421. The next prime is 21201443. The reversal of 21201433 is 33410212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201433 is a prime.

It is a super-2 number, since 2×21201433² = 899001522506978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21201443) 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, 5916 + ... + 8797.

It is an arithmetic number, because the mean of its divisors is an integer number (2913372).

Almost surely, 2^21201433 is an apocalyptic number.

It is an amenable number.

21201433 is a deficient number, since it is larger than the sum of its proper divisors (2105543).

21201433 is a wasteful number, since it uses less digits than its factorization.

21201433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14855.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21201433 is about 4604.5013845149. The cubic root of 21201433 is about 276.7717365155.

Adding to 21201433 its reverse (33410212), we get a palindrome (54611645).

It can be divided in two parts, 2120 and 1433, that added together give a palindrome (3553).

The spelling of 21201433 in words is "twenty-one million, two hundred one thousand, four hundred thirty-three".