20143361 has 8 divisors (see below), whose sum is σ = 23491200. Its totient is φ = 17265444.

The previous prime is 20143337. The next prime is 20143379. The reversal of 20143361 is 16334102.

It is not a de Polignac number, because 20143361 - 2⁶ = 20143297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20143301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29021 + ... + 29706.

It is an arithmetic number, because the mean of its divisors is an integer number (2936400).

Almost surely, 2^20143361 is an apocalyptic number.

It is an amenable number.

20143361 is a deficient number, since it is larger than the sum of its proper divisors (3347839).

20143361 is an frugal number, since it uses more digits than its factorization.

20143361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58748 (or 58734 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20143361 is about 4488.1355817310. The cubic root of 20143361 is about 272.0887875153.

Adding to 20143361 its reverse (16334102), we get a palindrome (36477463).

The spelling of 20143361 in words is "twenty million, one hundred forty-three thousand, three hundred sixty-one".