20061143 has 4 divisors (see below), whose sum is σ = 20077800. Its totient is φ = 20044488.

The previous prime is 20061137. The next prime is 20061161. The reversal of 20061143 is 34116002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34116002 = 2 ⋅17058001.

It is a cyclic number.

It is not a de Polignac number, because 20061143 - 2⁶ = 20061079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20061103) 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, 6368 + ... + 8981.

It is an arithmetic number, because the mean of its divisors is an integer number (5019450).

Almost surely, 2^20061143 is an apocalyptic number.

20061143 is a deficient number, since it is larger than the sum of its proper divisors (16657).

20061143 is a wasteful number, since it uses less digits than its factorization.

20061143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16656.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20061143 is about 4478.9667335224. The cubic root of 20061143 is about 271.7180929823.

Adding to 20061143 its reverse (34116002), we get a palindrome (54177145).

The spelling of 20061143 in words is "twenty million, sixty-one thousand, one hundred forty-three".