20342 has 8 divisors (see below), whose sum is σ = 34896. Its totient is φ = 8712.

The previous prime is 20341. The next prime is 20347. The reversal of 20342 is 24302.

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

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20341) 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, 713 + ... + 740.

It is an arithmetic number, because the mean of its divisors is an integer number (4362).

2²⁰³⁴² is an apocalyptic number.

20342 is a deficient number, since it is larger than the sum of its proper divisors (14554).

20342 is a wasteful number, since it uses less digits than its factorization.

20342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 20342 is about 142.6253834351. The cubic root of 20342 is about 27.2980243397.

Adding to 20342 its reverse (24302), we get a palindrome (44644).

The spelling of 20342 in words is "twenty thousand, three hundred forty-two", and thus it is an iban number.