20830636 has 18 divisors (see below), whose sum is σ = 37674420. Its totient is φ = 10077480.

The previous prime is 20830633. The next prime is 20830637. The reversal of 20830636 is 63603802.

It is not an unprimeable number, because it can be changed into a prime (20830633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1135 + ... + 6553.

Almost surely, 2^20830636 is an apocalyptic number.

It is an amenable number.

20830636 is a deficient number, since it is larger than the sum of its proper divisors (16843784).

20830636 is a wasteful number, since it uses less digits than its factorization.

20830636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5485 (or 5452 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 20830636 is about 4564.0591582494. The cubic root of 20830636 is about 275.1487283641.

The spelling of 20830636 in words is "twenty million, eight hundred thirty thousand, six hundred thirty-six".