21360104 has 16 divisors (see below), whose sum is σ = 42158400. Its totient is φ = 10117872.

The previous prime is 21360083. The next prime is 21360107. The reversal of 21360104 is 40106312.

It is not an unprimeable number, because it can be changed into a prime (21360107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70112 + ... + 70415.

It is an arithmetic number, because the mean of its divisors is an integer number (2634900).

Almost surely, 2^21360104 is an apocalyptic number.

It is an amenable number.

21360104 is a deficient number, since it is larger than the sum of its proper divisors (20798296).

21360104 is a wasteful number, since it uses less digits than its factorization.

21360104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140552 (or 140548 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21360104 is about 4621.6992546032. The cubic root of 21360104 is about 277.4604721449.

Adding to 21360104 its reverse (40106312), we get a palindrome (61466416).

The spelling of 21360104 in words is "twenty-one million, three hundred sixty thousand, one hundred four".