21604114 has 16 divisors (see below), whose sum is σ = 37824768. Its totient is φ = 9061632.

The previous prime is 21604109. The next prime is 21604139. The reversal of 21604114 is 41140612.

It is a junction number, because it is equal to n+sod(n) for n = 21604091 and 21604100.

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, 15759 + ... + 17074.

It is an arithmetic number, because the mean of its divisors is an integer number (2364048).

Almost surely, 2^21604114 is an apocalyptic number.

21604114 is a deficient number, since it is larger than the sum of its proper divisors (16220654).

21604114 is a wasteful number, since it uses less digits than its factorization.

21604114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32889.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21604114 is about 4648.0225903065. The cubic root of 21604114 is about 278.5130099096.

Adding to 21604114 its reverse (41140612), we get a palindrome (62744726).

The spelling of 21604114 in words is "twenty-one million, six hundred four thousand, one hundred fourteen".