20945012 has 12 divisors (see below), whose sum is σ = 39986016. Its totient is φ = 9520440.

The previous prime is 20944981. The next prime is 20945039. The reversal of 20945012 is 21054902.

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, 237968 + ... + 238055.

It is an arithmetic number, because the mean of its divisors is an integer number (3332168).

Almost surely, 2^20945012 is an apocalyptic number.

20945012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20945012 is a deficient number, since it is larger than the sum of its proper divisors (19041004).

20945012 is a wasteful number, since it uses less digits than its factorization.

20945012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476038 (or 476036 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20945012 is about 4576.5720796247. The cubic root of 20945012 is about 275.6514012414.

Adding to 20945012 its reverse (21054902), we get a palindrome (41999914).

The spelling of 20945012 in words is "twenty million, nine hundred forty-five thousand, twelve".