21195342 has 48 divisors (see below), whose sum is σ = 53570400. Its totient is φ = 6054048.

The previous prime is 21195341. The next prime is 21195367. The reversal of 21195342 is 24359112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21195341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4458 + ... + 7890.

It is an arithmetic number, because the mean of its divisors is an integer number (1116050).

Almost surely, 2^21195342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21195342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26785200).

21195342 is an abundant number, since it is smaller than the sum of its proper divisors (32375058).

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

21195342 is a wasteful number, since it uses less digits than its factorization.

21195342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462 (or 3445 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 21195342 is about 4603.8399190241. The cubic root of 21195342 is about 276.7452292174.

The spelling of 21195342 in words is "twenty-one million, one hundred ninety-five thousand, three hundred forty-two".