20869012 has 6 divisors (see below), whose sum is σ = 36520778. Its totient is φ = 10434504.

The previous prime is 20869003. The next prime is 20869091. The reversal of 20869012 is 21096802.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19395216 + 1473796 = 4404^2 + 1214^2 .

It is a super-2 number, since 2×20869012² = 871031323712288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2608623 + ... + 2608630.

Almost surely, 2^20869012 is an apocalyptic number.

It is an amenable number.

20869012 is a deficient number, since it is larger than the sum of its proper divisors (15651766).

20869012 is a wasteful number, since it uses less digits than its factorization.

20869012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217257 (or 5217255 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20869012 is about 4568.2613760598. The cubic root of 20869012 is about 275.3175923061.

The spelling of 20869012 in words is "twenty million, eight hundred sixty-nine thousand, twelve".