20845012 has 12 divisors (see below), whose sum is σ = 36560160. Its totient is φ = 10399256.

The previous prime is 20845007. The next prime is 20845021. The reversal of 20845012 is 21054802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3712 + ... + 7447.

It is an arithmetic number, because the mean of its divisors is an integer number (3046680).

Almost surely, 2^20845012 is an apocalyptic number.

It is an amenable number.

20845012 is a deficient number, since it is larger than the sum of its proper divisors (15715148).

20845012 is a wasteful number, since it uses less digits than its factorization.

20845012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11630 (or 11628 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20845012 is about 4565.6338004706. The cubic root of 20845012 is about 275.2120106136.

Adding to 20845012 its reverse (21054802), we get a palindrome (41899814).

The spelling of 20845012 in words is "twenty million, eight hundred forty-five thousand, twelve".