20310212 has 12 divisors (see below), whose sum is σ = 38277036. Its totient is φ = 9373920.

The previous prime is 20310209. The next prime is 20310217. The reversal of 20310212 is 21201302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5456896 + 14853316 = 2336^2 + 3854^2 .

It is a super-2 number, since 2×20310212² = 825009422969888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20310193 and 20310202.

It is not an unprimeable number, because it can be changed into a prime (20310217) 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, 195239 + ... + 195342.

It is an arithmetic number, because the mean of its divisors is an integer number (3189753).

Almost surely, 2^20310212 is an apocalyptic number.

It is an amenable number.

20310212 is a deficient number, since it is larger than the sum of its proper divisors (17966824).

20310212 is a wasteful number, since it uses less digits than its factorization.

20310212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390598 (or 390596 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20310212 is about 4506.6852563719. The cubic root of 20310212 is about 272.8379758394.

Adding to 20310212 its reverse (21201302), we get a palindrome (41511514).

The spelling of 20310212 in words is "twenty million, three hundred ten thousand, two hundred twelve".