20540342 has 8 divisors (see below), whose sum is σ = 31181976. Its totient is φ = 10146352.

The previous prime is 20540341. The next prime is 20540353. The reversal of 20540342 is 24304502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540341) 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, 61703 + ... + 62034.

It is an arithmetic number, because the mean of its divisors is an integer number (3897747).

Almost surely, 2^20540342 is an apocalyptic number.

20540342 is a deficient number, since it is larger than the sum of its proper divisors (10641634).

20540342 is a wasteful number, since it uses less digits than its factorization.

20540342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123822.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20540342 is about 4532.1454080821. The cubic root of 20540342 is about 273.8645946838.

Adding to 20540342 its reverse (24304502), we get a palindrome (44844844).

The spelling of 20540342 in words is "twenty million, five hundred forty thousand, three hundred forty-two".