21334100 has 36 divisors (see below), whose sum is σ = 46510044. Its totient is φ = 8494080.

The previous prime is 21334067. The next prime is 21334123. The reversal of 21334100 is 143312.

It can be written as a sum of positive squares in 6 ways, for example, as 4963984 + 16370116 = 2228^2 + 4046^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31364 + ... + 32036.

Almost surely, 2^21334100 is an apocalyptic number.

21334100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21334100 is an abundant number, since it is smaller than the sum of its proper divisors (25175944).

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

21334100 is a wasteful number, since it uses less digits than its factorization.

21334100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21334100 is about 4618.8851468726. The cubic root of 21334100 is about 277.3478320566.

Adding to 21334100 its reverse (143312), we get a palindrome (21477412).

The spelling of 21334100 in words is "twenty-one million, three hundred thirty-four thousand, one hundred".