20783012 has 12 divisors (see below), whose sum is σ = 36560076. Its totient is φ = 10337280.

The previous prime is 20783003. The next prime is 20783039. The reversal of 20783012 is 21038702.

It can be written as a sum of positive squares in 2 ways, for example, as 14945956 + 5837056 = 3866^2 + 2416^2 .

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, 12689 + ... + 14232.

It is an arithmetic number, because the mean of its divisors is an integer number (3046673).

Almost surely, 2^20783012 is an apocalyptic number.

It is an amenable number.

20783012 is a deficient number, since it is larger than the sum of its proper divisors (15777064).

20783012 is a wasteful number, since it uses less digits than its factorization.

20783012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27118 (or 27116 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20783012 is about 4558.8388872607. The cubic root of 20783012 is about 274.9388822856.

The spelling of 20783012 in words is "twenty million, seven hundred eighty-three thousand, twelve".