20312130 has 32 divisors (see below), whose sum is σ = 50323968. Its totient is φ = 5241600.

The previous prime is 20312113. The next prime is 20312137. The reversal of 20312130 is 3121302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20312137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9991 + ... + 11850.

It is an arithmetic number, because the mean of its divisors is an integer number (1572624).

Almost surely, 2^20312130 is an apocalyptic number.

20312130 is an abundant number, since it is smaller than the sum of its proper divisors (30011838).

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

20312130 is a wasteful number, since it uses less digits than its factorization.

20312130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21882.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20312130 is about 4506.8980463285. The cubic root of 20312130 is about 272.8465640768.

Adding to 20312130 its reverse (3121302), we get a palindrome (23433432).

The spelling of 20312130 in words is "twenty million, three hundred twelve thousand, one hundred thirty".