21536104 has 32 divisors (see below), whose sum is σ = 41277600. Its totient is φ = 10532160.

The previous prime is 21536089. The next prime is 21536107. The reversal of 21536104 is 40163512.

It is not an unprimeable number, because it can be changed into a prime (21536107) by changing a digit.

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, 118894 + ... + 119074.

It is an arithmetic number, because the mean of its divisors is an integer number (1289925).

Almost surely, 2^21536104 is an apocalyptic number.

It is an amenable number.

21536104 is a deficient number, since it is larger than the sum of its proper divisors (19741496).

21536104 is a wasteful number, since it uses less digits than its factorization.

21536104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 21536104 is about 4640.7008091451. The cubic root of 21536104 is about 278.2204486435.

Adding to 21536104 its reverse (40163512), we get a palindrome (61699616).

The spelling of 21536104 in words is "twenty-one million, five hundred thirty-six thousand, one hundred four".