20312012 has 24 divisors (see below), whose sum is σ = 41024256. Its totient is φ = 8619408.

The previous prime is 20311981. The next prime is 20312021. The reversal of 20312012 is 21021302.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20311984 and 20312002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638 + ... + 6405.

It is an arithmetic number, because the mean of its divisors is an integer number (1709344).

Almost surely, 2^20312012 is an apocalyptic number.

It is an amenable number.

20312012 is an abundant number, since it is smaller than the sum of its proper divisors (20712244).

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

20312012 is a wasteful number, since it uses less digits than its factorization.

20312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7157 (or 7155 counting only the distinct ones).

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

The square root of 20312012 is about 4506.8849552657. The cubic root of 20312012 is about 272.8460357233.

Adding to 20312012 its reverse (21021302), we get a palindrome (41333314).

The spelling of 20312012 in words is "twenty million, three hundred twelve thousand, twelve".