21433000 has 32 divisors (see below), whose sum is σ = 50155560. Its totient is φ = 8572800.

The previous prime is 21432991. The next prime is 21433051. The reversal of 21433000 is 33412.

It can be written as a sum of positive squares in 4 ways, for example, as 2125764 + 19307236 = 1458^2 + 4394^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9717 + ... + 11716.

Almost surely, 2^21433000 is an apocalyptic number.

21433000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21433000 is an abundant number, since it is smaller than the sum of its proper divisors (28722560).

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

21433000 is a wasteful number, since it uses less digits than its factorization.

21433000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21454 (or 21440 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21433000 is about 4629.5788145359. The cubic root of 21433000 is about 277.7757451703.

Adding to 21433000 its reverse (33412), we get a palindrome (21466412).

The spelling of 21433000 in words is "twenty-one million, four hundred thirty-three thousand".