20310042 has 16 divisors (see below), whose sum is σ = 41309280. Its totient is φ = 6655152.

The previous prime is 20310029. The next prime is 20310049. The reversal of 20310042 is 24001302.

It is not an unprimeable number, because it can be changed into a prime (20310049) 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, 28333 + ... + 29040.

It is an arithmetic number, because the mean of its divisors is an integer number (2581830).

Almost surely, 2^20310042 is an apocalyptic number.

20310042 is an abundant number, since it is smaller than the sum of its proper divisors (20999238).

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

20310042 is a wasteful number, since it uses less digits than its factorization.

20310042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57437.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20310042 is about 4506.6663954635. Note that the first 3 decimals coincide. The cubic root of 20310042 is about 272.8372146035.

Adding to 20310042 its reverse (24001302), we get a palindrome (44311344).

The spelling of 20310042 in words is "twenty million, three hundred ten thousand, forty-two".