20107143 has 32 divisors (see below), whose sum is σ = 34283520. Its totient is φ = 11409120.

The previous prime is 20107133. The next prime is 20107151. The reversal of 20107143 is 34170102.

It is not a de Polignac number, because 20107143 - 2¹² = 20103047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20107133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35821 + ... + 36377.

It is an arithmetic number, because the mean of its divisors is an integer number (1071360).

Almost surely, 2^20107143 is an apocalyptic number.

20107143 is a deficient number, since it is larger than the sum of its proper divisors (14176377).

20107143 is a wasteful number, since it uses less digits than its factorization.

20107143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20107143 is about 4484.0989061349. The cubic root of 20107143 is about 271.9256167351.

Adding to 20107143 its product of nonzero digits (168), we get a triangular number (20107311 = T₆₃₄₁).

Adding to 20107143 its reverse (34170102), we get a palindrome (54277245).

The spelling of 20107143 in words is "twenty million, one hundred seven thousand, one hundred forty-three".