20310342 has 64 divisors (see below), whose sum is σ = 47355840. Its totient is φ = 5770752.

The previous prime is 20310341. The next prime is 20310343. The reversal of 20310342 is 24301302.

It is an interprime number because it is at equal distance from previous prime (20310341) and next prime (20310343).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383188 + ... + 383240.

It is an arithmetic number, because the mean of its divisors is an integer number (739935).

Almost surely, 2^20310342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20310342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23677920).

20310342 is an abundant number, since it is smaller than the sum of its proper divisors (27045498).

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

20310342 is a wasteful number, since it uses less digits than its factorization.

20310342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20310342 is about 4506.6996793663. The cubic root of 20310342 is about 272.8385579581.

Adding to 20310342 its reverse (24301302), we get a palindrome (44611644).

The spelling of 20310342 in words is "twenty million, three hundred ten thousand, three hundred forty-two".