20308542 has 16 divisors (see below), whose sum is σ = 40680192. Its totient is φ = 6759000.

The previous prime is 20308529. The next prime is 20308543. The reversal of 20308542 is 24580302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20308543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2253 + ... + 6759.

It is an arithmetic number, because the mean of its divisors is an integer number (2542512).

Almost surely, 2^20308542 is an apocalyptic number.

It is a pronic number, being equal to 4506×4507.

20308542 is an abundant number, since it is smaller than the sum of its proper divisors (20371650).

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

20308542 is a wasteful number, since it uses less digits than its factorization.

20308542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20308542 is about 4506.4999722623. The cubic root of 20308542 is about 272.8304976324.

Adding to 20308542 its reverse (24580302), we get a palindrome (44888844).

The spelling of 20308542 in words is "twenty million, three hundred eight thousand, five hundred forty-two".