20287343 has 2 divisors, whose sum is σ = 20287344. Its totient is φ = 20287342.

The previous prime is 20287313. The next prime is 20287363. The reversal of 20287343 is 34378202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20287343 - 2¹² = 20283247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20287313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10143671 + 10143672.

It is an arithmetic number, because the mean of its divisors is an integer number (10143672).

Almost surely, 2^20287343 is an apocalyptic number.

20287343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20287343 is an equidigital number, since it uses as much as digits as its factorization.

20287343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 20287343 is about 4504.1473110901. The cubic root of 20287343 is about 272.7355335309.

The spelling of 20287343 in words is "twenty million, two hundred eighty-seven thousand, three hundred forty-three".