20206963 has 6 divisors (see below), whose sum is σ = 23506116. Its totient is φ = 17320212.

The previous prime is 20206961. The next prime is 20206981. The reversal of 20206963 is 36960202.

It is not a de Polignac number, because 20206963 - 2¹ = 20206961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20206961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206145 + ... + 206242.

It is an arithmetic number, because the mean of its divisors is an integer number (3917686).

Almost surely, 2^20206963 is an apocalyptic number.

20206963 is a deficient number, since it is larger than the sum of its proper divisors (3299153).

20206963 is an equidigital number, since it uses as much as digits as its factorization.

20206963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412401 (or 412394 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 20206963 is about 4495.2155676897. The cubic root of 20206963 is about 272.3748571077.

The spelling of 20206963 in words is "twenty million, two hundred six thousand, nine hundred sixty-three".