21433498 has 16 divisors (see below), whose sum is σ = 34167744. Its totient is φ = 10048960.

The previous prime is 21433487. The next prime is 21433507. The reversal of 21433498 is 89433412.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9561 + ... + 11587.

It is an arithmetic number, because the mean of its divisors is an integer number (2135484).

Almost surely, 2^21433498 is an apocalyptic number.

21433498 is a deficient number, since it is larger than the sum of its proper divisors (12734246).

21433498 is a wasteful number, since it uses less digits than its factorization.

21433498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357.

The product of its digits is 20736, while the sum is 34.

The square root of 21433498 is about 4629.6325988139. The cubic root of 21433498 is about 277.7778965451. Note that the first 3 decimals are identical.

The spelling of 21433498 in words is "twenty-one million, four hundred thirty-three thousand, four hundred ninety-eight".