20993012 has 12 divisors (see below), whose sum is σ = 37019136. Its totient is φ = 10416120.

The previous prime is 20993009. The next prime is 20993017. The reversal of 20993012 is 21039902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20993017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19508 + ... + 20555.

It is an arithmetic number, because the mean of its divisors is an integer number (3084928).

Almost surely, 2^20993012 is an apocalyptic number.

It is an amenable number.

20993012 is a deficient number, since it is larger than the sum of its proper divisors (16026124).

20993012 is a wasteful number, since it uses less digits than its factorization.

20993012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40198 (or 40196 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 20993012 is about 4581.8131782079. The cubic root of 20993012 is about 275.8618120809.

The spelling of 20993012 in words is "twenty million, nine hundred ninety-three thousand, twelve".