21033414 has 12 divisors (see below), whose sum is σ = 45572436. Its totient is φ = 7011132.

The previous prime is 21033413. The next prime is 21033433. The reversal of 21033414 is 41433012.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1168523 = 21033414 / (2 + 1 + 0 + 3 + 3 + 4 + 1 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033413) 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 5 ways as a sum of consecutive naturals, for example, 584244 + ... + 584279.

It is an arithmetic number, because the mean of its divisors is an integer number (3797703).

Almost surely, 2^21033414 is an apocalyptic number.

21033414 is an abundant number, since it is smaller than the sum of its proper divisors (24539022).

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

21033414 is a wasteful number, since it uses less digits than its factorization.

21033414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168531 (or 1168528 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 21033414 is about 4586.2200121669. The cubic root of 21033414 is about 276.0386681802.

Adding to 21033414 its reverse (41433012), we get a palindrome (62466426).

The spelling of 21033414 in words is "twenty-one million, thirty-three thousand, four hundred fourteen".