21434200 has 24 divisors (see below), whose sum is σ = 49834980. Its totient is φ = 8573600.

The previous prime is 21434177. The next prime is 21434213. The reversal of 21434200 is 243412.

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, 53386 + ... + 53785.

Almost surely, 2^21434200 is an apocalyptic number.

21434200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21434200 is an abundant number, since it is smaller than the sum of its proper divisors (28400780).

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

21434200 is a wasteful number, since it uses less digits than its factorization.

21434200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107187 (or 107178 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 21434200 is about 4629.7084141445. The cubic root of 21434200 is about 277.7809291494.

Adding to 21434200 its reverse (243412), we get a palindrome (21677612).

The spelling of 21434200 in words is "twenty-one million, four hundred thirty-four thousand, two hundred".