21104069 has 8 divisors (see below), whose sum is σ = 24214848. Its totient is φ = 18017280.

The previous prime is 21104063. The next prime is 21104071. The reversal of 21104069 is 96040112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21104069 - 2¹² = 21099973 is a prime.

It is a super-2 number, since 2×21104069² = 890763456713522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4067 + ... + 7664.

It is an arithmetic number, because the mean of its divisors is an integer number (3026856).

Almost surely, 2^21104069 is an apocalyptic number.

It is an amenable number.

21104069 is a deficient number, since it is larger than the sum of its proper divisors (3110779).

21104069 is a wasteful number, since it uses less digits than its factorization.

21104069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11995.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 21104069 is about 4593.9165207914. The cubic root of 21104069 is about 276.3474104854.

The spelling of 21104069 in words is "twenty-one million, one hundred four thousand, sixty-nine".