20373143 has 4 divisors (see below), whose sum is σ = 23283600. Its totient is φ = 17462688.

The previous prime is 20373139. The next prime is 20373151. The reversal of 20373143 is 34137302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34137302 = 2 ⋅17068651.

It is a cyclic number.

It is not a de Polignac number, because 20373143 - 2² = 20373139 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 (20373103) 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, 1455218 + ... + 1455231.

It is an arithmetic number, because the mean of its divisors is an integer number (5820900).

Almost surely, 2^20373143 is an apocalyptic number.

20373143 is a deficient number, since it is larger than the sum of its proper divisors (2910457).

20373143 is an equidigital number, since it uses as much as digits as its factorization.

20373143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910456.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 20373143 is about 4513.6618171945. The cubic root of 20373143 is about 273.1194805895.

The spelling of 20373143 in words is "twenty million, three hundred seventy-three thousand, one hundred forty-three".