21269200 has 30 divisors (see below), whose sum is σ = 51100214. Its totient is φ = 8507520.

The previous prime is 21269197. The next prime is 21269233. The reversal of 21269200 is 296212.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1838736 + 19430464 = 1356^2 + 4408^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26187 + ... + 26986.

Almost surely, 2^21269200 is an apocalyptic number.

21269200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21269200 is an abundant number, since it is smaller than the sum of its proper divisors (29831014).

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

21269200 is a wasteful number, since it uses less digits than its factorization.

21269200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53191 (or 53180 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 21269200 is about 4611.8542908466. The cubic root of 21269200 is about 277.0663084621.

The spelling of 21269200 in words is "twenty-one million, two hundred sixty-nine thousand, two hundred".