20005012 has 48 divisors (see below), whose sum is σ = 38304000. Its totient is φ = 9120384.

The previous prime is 20005003. The next prime is 20005021. The reversal of 20005012 is 21050002.

It is an interprime number because it is at equal distance from previous prime (20005003) and next prime (20005021).

It is a self number, because there is not a number n which added to its sum of digits gives 20005012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253189 + ... + 253267.

It is an arithmetic number, because the mean of its divisors is an integer number (798000).

Almost surely, 2^20005012 is an apocalyptic number.

It is an amenable number.

20005012 is a deficient number, since it is larger than the sum of its proper divisors (18298988).

20005012 is a wasteful number, since it uses less digits than its factorization.

20005012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 206 counting only the distinct ones).

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

The square root of 20005012 is about 4472.6962785327. The cubic root of 20005012 is about 271.4644342008.

Adding to 20005012 its reverse (21050002), we get a palindrome (41055014).

The spelling of 20005012 in words is "twenty million, five thousand, twelve".