20500012 has 24 divisors (see below), whose sum is σ = 40670000. Its totient is φ = 8963136.

The previous prime is 20499971. The next prime is 20500019. The reversal of 20500012 is 21000502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9387 + ... + 11362.

Almost surely, 2^20500012 is an apocalyptic number.

It is an amenable number.

20500012 is a deficient number, since it is larger than the sum of its proper divisors (20169988).

20500012 is a wasteful number, since it uses less digits than its factorization.

20500012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20785 (or 20783 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 20500012 is about 4527.6938942468. The cubic root of 20500012 is about 273.6852371419.

Adding to 20500012 its reverse (21000502), we get a palindrome (41500514).

The spelling of 20500012 in words is "twenty million, five hundred thousand, twelve".