20143963 has 16 divisors (see below), whose sum is σ = 24615360. Its totient is φ = 16091136.

The previous prime is 20143961. The next prime is 20143967. The reversal of 20143963 is 36934102.

It is a cyclic number.

It is not a de Polignac number, because 20143963 - 2¹ = 20143961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20143961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12195 + ... + 13747.

It is an arithmetic number, because the mean of its divisors is an integer number (1538460).

Almost surely, 2^20143963 is an apocalyptic number.

20143963 is a deficient number, since it is larger than the sum of its proper divisors (4471397).

20143963 is a wasteful number, since it uses less digits than its factorization.

20143963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686.

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

The square root of 20143963 is about 4488.2026469401. The cubic root of 20143963 is about 272.0914980166.

The spelling of 20143963 in words is "twenty million, one hundred forty-three thousand, nine hundred sixty-three".