21334104 has 160 divisors (see below), whose sum is σ = 67692240. Its totient is φ = 6220800.

The previous prime is 21334067. The next prime is 21334123. The reversal of 21334104 is 40143312.

Added to its reverse (40143312) it gives a triangular number (61477416 = T₁₁₀₈₈).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 292212 + ... + 292284.

Almost surely, 2^21334104 is an apocalyptic number.

21334104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21334104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33846120).

21334104 is an abundant number, since it is smaller than the sum of its proper divisors (46358136).

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

21334104 is a wasteful number, since it uses less digits than its factorization.

21334104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 130 counting only the distinct ones).

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

The square root of 21334104 is about 4618.8855798775. The cubic root of 21334104 is about 277.3478493902.

Adding to 21334104 its reverse (40143312), we get a palindrome (61477416).

The spelling of 21334104 in words is "twenty-one million, three hundred thirty-four thousand, one hundred four".