21342102 has 8 divisors (see below), whose sum is σ = 42684216. Its totient is φ = 7114032.

The previous prime is 21342071. The next prime is 21342119. The reversal of 21342102 is 20124312.

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

21342102 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778503 + ... + 1778514.

It is an arithmetic number, because the mean of its divisors is an integer number (5335527).

Almost surely, 2^21342102 is an apocalyptic number.

21342102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21342102 is a wasteful number, since it uses less digits than its factorization.

21342102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557022.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21342102 is about 4619.7512920070. The cubic root of 21342102 is about 277.3825036220.

Adding to 21342102 its reverse (20124312), we get a palindrome (41466414).

The spelling of 21342102 in words is "twenty-one million, three hundred forty-two thousand, one hundred two".