20168283 has 4 divisors (see below), whose sum is σ = 26891048. Its totient is φ = 13445520.

The previous prime is 20168279. The next prime is 20168303. The reversal of 20168283 is 38286102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20168283 - 2² = 20168279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20168283.

It is not an unprimeable number, because it can be changed into a prime (20168243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3361378 + ... + 3361383.

It is an arithmetic number, because the mean of its divisors is an integer number (6722762).

Almost surely, 2^20168283 is an apocalyptic number.

20168283 is a deficient number, since it is larger than the sum of its proper divisors (6722765).

20168283 is an equidigital number, since it uses as much as digits as its factorization.

20168283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6722764.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20168283 is about 4490.9111547658. The cubic root of 20168283 is about 272.2009535391.

The spelling of 20168283 in words is "twenty million, one hundred sixty-eight thousand, two hundred eighty-three".