20393143 has 2 divisors, whose sum is σ = 20393144. Its totient is φ = 20393142.

The previous prime is 20393123. The next prime is 20393147. The reversal of 20393143 is 34139302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20393143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20393147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10196571 + 10196572.

It is an arithmetic number, because the mean of its divisors is an integer number (10196572).

Almost surely, 2^20393143 is an apocalyptic number.

20393143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20393143 is an equidigital number, since it uses as much as digits as its factorization.

20393143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 20393143 is about 4515.8767697979. The cubic root of 20393143 is about 273.2088237530.

The spelling of 20393143 in words is "twenty million, three hundred ninety-three thousand, one hundred forty-three".