20323351 has 2 divisors, whose sum is σ = 20323352. Its totient is φ = 20323350.

The previous prime is 20323339. The next prime is 20323367. The reversal of 20323351 is 15332302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20323351 - 2¹¹ = 20321303 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20323151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161675 + 10161676.

It is an arithmetic number, because the mean of its divisors is an integer number (10161676).

Almost surely, 2^20323351 is an apocalyptic number.

20323351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323351 is an equidigital number, since it uses as much as digits as its factorization.

20323351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 20323351 is about 4508.1427439690. The cubic root of 20323351 is about 272.8967975694.

Adding to 20323351 its reverse (15332302), we get a palindrome (35655653).

The spelling of 20323351 in words is "twenty million, three hundred twenty-three thousand, three hundred fifty-one".