21335104 has 28 divisors (see below), whose sum is σ = 48385984. Its totient is φ = 9143424.

The previous prime is 21335101. The next prime is 21335107. The reversal of 21335104 is 40153312.

It is an interprime number because it is at equal distance from previous prime (21335101) and next prime (21335107).

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (21335101) 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, 23364 + ... + 24259.

Almost surely, 2^21335104 is an apocalyptic number.

It is an amenable number.

21335104 is an abundant number, since it is smaller than the sum of its proper divisors (27050880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21335104 is an equidigital number, since it uses as much as digits as its factorization.

21335104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47642 (or 47632 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 21335104 is about 4618.9938298292. The cubic root of 21335104 is about 277.3521827261.

Adding to 21335104 its reverse (40153312), we get a palindrome (61488416).

The spelling of 21335104 in words is "twenty-one million, three hundred thirty-five thousand, one hundred four".