20000012 has 24 divisors (see below), whose sum is σ = 35816256. Its totient is φ = 9769808.

The previous prime is 20000003. The next prime is 20000023. The reversal of 20000012 is 21000002.

It is a junction number, because it is equal to n+sod(n) for n = 19999960 and 20000005.

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, 35243 + ... + 35805.

It is an arithmetic number, because the mean of its divisors is an integer number (1492344).

Almost surely, 2^20000012 is an apocalyptic number.

It is an amenable number.

20000012 is a deficient number, since it is larger than the sum of its proper divisors (15816244).

20000012 is a wasteful number, since it uses less digits than its factorization.

20000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 20000012 is about 4472.1372966402. The cubic root of 20000012 is about 271.4418159478.

Adding to 20000012 its reverse (21000002), we get a palindrome (41000014).

Multiplying 20000012 by its reverse (21000002), we get a palindrome (420000292000024).

The spelling of 20000012 in words is "twenty million, twelve", and thus it is an aban number and an uban number.