20263983 has 16 divisors (see below), whose sum is σ = 28740096. Its totient is φ = 12656000.

The previous prime is 20263961. The next prime is 20264029. The reversal of 20263983 is 38936202.

It is a cyclic number.

It is not a de Polignac number, because 20263983 - 2¹² = 20259887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20263913) 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 15 ways as a sum of consecutive naturals, for example, 12010 + ... + 13592.

It is an arithmetic number, because the mean of its divisors is an integer number (1796256).

Almost surely, 2^20263983 is an apocalyptic number.

20263983 is a deficient number, since it is larger than the sum of its proper divisors (8476113).

20263983 is a wasteful number, since it uses less digits than its factorization.

20263983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 20263983 is about 4501.5533985503. The cubic root of 20263983 is about 272.6308122608.

The spelling of 20263983 in words is "twenty million, two hundred sixty-three thousand, nine hundred eighty-three".