21432034 has 32 divisors (see below), whose sum is σ = 35852544. Its totient is φ = 9547200.

The previous prime is 21432023. The next prime is 21432077. The reversal of 21432034 is 43023412.

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 15 ways as a sum of consecutive naturals, for example, 141859 + ... + 142009.

It is an arithmetic number, because the mean of its divisors is an integer number (1120392).

Almost surely, 2^21432034 is an apocalyptic number.

21432034 is a deficient number, since it is larger than the sum of its proper divisors (14420510).

21432034 is a wasteful number, since it uses less digits than its factorization.

21432034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 21432034 is about 4629.4744842152. The cubic root of 21432034 is about 277.7715719265.

Adding to 21432034 its reverse (43023412), we get a palindrome (64455446).

The spelling of 21432034 in words is "twenty-one million, four hundred thirty-two thousand, thirty-four".