20143207 has 8 divisors (see below), whose sum is σ = 23643296. Its totient is φ = 16798752.

The previous prime is 20143171. The next prime is 20143219. The reversal of 20143207 is 70234102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20143207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38628 + ... + 39145.

It is an arithmetic number, because the mean of its divisors is an integer number (2955412).

Almost surely, 2^20143207 is an apocalyptic number.

20143207 is a deficient number, since it is larger than the sum of its proper divisors (3500089).

20143207 is an equidigital number, since it uses as much as digits as its factorization.

20143207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77817.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 20143207 is about 4488.1184253538. The cubic root of 20143207 is about 272.0880941225.

Adding to 20143207 its reverse (70234102), we get a palindrome (90377309).

The spelling of 20143207 in words is "twenty million, one hundred forty-three thousand, two hundred seven".