21433350 has 48 divisors (see below), whose sum is σ = 54407232. Its totient is φ = 5580960.

The previous prime is 21433319. The next prime is 21433351. The reversal of 21433350 is 5333412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4789 + ... + 8111.

It is an arithmetic number, because the mean of its divisors is an integer number (1133484).

Almost surely, 2^21433350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21433350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27203616).

21433350 is an abundant number, since it is smaller than the sum of its proper divisors (32973882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21433350 is a wasteful number, since it uses less digits than its factorization.

21433350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381 (or 3376 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 21433350 is about 4629.6166147965. The cubic root of 21433350 is about 277.7772571842. Note that the first 3 decimals are identical.

Adding to 21433350 its reverse (5333412), we get a palindrome (26766762).

The spelling of 21433350 in words is "twenty-one million, four hundred thirty-three thousand, three hundred fifty".