21104342 has 8 divisors (see below), whose sum is σ = 36178896. Its totient is φ = 9044712.

The previous prime is 21104341. The next prime is 21104389. The reversal of 21104342 is 24340112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21104342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104341) 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, 753713 + ... + 753740.

It is an arithmetic number, because the mean of its divisors is an integer number (4522362).

Almost surely, 2^21104342 is an apocalyptic number.

21104342 is a deficient number, since it is larger than the sum of its proper divisors (15074554).

21104342 is a wasteful number, since it uses less digits than its factorization.

21104342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507462.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21104342 is about 4593.9462339039. The cubic root of 21104342 is about 276.3486020805.

Adding to 21104342 its reverse (24340112), we get a palindrome (45444454).

The spelling of 21104342 in words is "twenty-one million, one hundred four thousand, three hundred forty-two".