21104354 has 16 divisors (see below), whose sum is σ = 32196096. Its totient is φ = 10374000.

The previous prime is 21104341. The next prime is 21104389. The reversal of 21104354 is 45340112.

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, 38309 + ... + 38855.

It is an arithmetic number, because the mean of its divisors is an integer number (2012256).

Almost surely, 2^21104354 is an apocalyptic number.

21104354 is a deficient number, since it is larger than the sum of its proper divisors (11091742).

21104354 is a wasteful number, since it uses less digits than its factorization.

21104354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 21104354 is about 4593.9475399704. The cubic root of 21104354 is about 276.3486544581.

Adding to 21104354 its reverse (45340112), we get a palindrome (66444466).

The spelling of 21104354 in words is "twenty-one million, one hundred four thousand, three hundred fifty-four".