21201342 has 8 divisors (see below), whose sum is σ = 42402696. Its totient is φ = 7067112.

The previous prime is 21201311. The next prime is 21201347. The reversal of 21201342 is 24310212.

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

21201342 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201347) 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, 1766773 + ... + 1766784.

It is an arithmetic number, because the mean of its divisors is an integer number (5300337).

Almost surely, 2^21201342 is an apocalyptic number.

21201342 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.

21201342 is a wasteful number, since it uses less digits than its factorization.

21201342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533562.

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

The square root of 21201342 is about 4604.4915028698. The cubic root of 21201342 is about 276.7713405318.

Adding to 21201342 its reverse (24310212), we get a palindrome (45511554).

The spelling of 21201342 in words is "twenty-one million, two hundred one thousand, three hundred forty-two".