20233643 has 2 divisors, whose sum is σ = 20233644. Its totient is φ = 20233642.

The previous prime is 20233601. The next prime is 20233649. The reversal of 20233643 is 34633202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20233643 - 2⁶ = 20233579 is a prime.

It is a zygodrome in base 7.

It is not a weakly prime, because it can be changed into another prime (20233649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10116821 + 10116822.

It is an arithmetic number, because the mean of its divisors is an integer number (10116822).

Almost surely, 2^20233643 is an apocalyptic number.

20233643 is a deficient number, since it is larger than the sum of its proper divisors (1).

20233643 is an equidigital number, since it uses as much as digits as its factorization.

20233643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 20233643 is about 4498.1821883957. The cubic root of 20233643 is about 272.4946799175.

Adding to 20233643 its reverse (34633202), we get a palindrome (54866845).

The spelling of 20233643 in words is "twenty million, two hundred thirty-three thousand, six hundred forty-three".