20247263 has 2 divisors, whose sum is σ = 20247264. Its totient is φ = 20247262.

The previous prime is 20247257. The next prime is 20247301. The reversal of 20247263 is 36274202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20247263 - 2²⁰ = 19198687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20247763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10123631 + 10123632.

It is an arithmetic number, because the mean of its divisors is an integer number (10123632).

Almost surely, 2^20247263 is an apocalyptic number.

20247263 is a deficient number, since it is larger than the sum of its proper divisors (1).

20247263 is an equidigital number, since it uses as much as digits as its factorization.

20247263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20247263 is about 4499.6958786122. The cubic root of 20247263 is about 272.5558082257. Note that the first 3 decimals are identical.

The spelling of 20247263 in words is "twenty million, two hundred forty-seven thousand, two hundred sixty-three".