20823343 has 2 divisors, whose sum is σ = 20823344. Its totient is φ = 20823342.

The previous prime is 20823337. The next prime is 20823347. The reversal of 20823343 is 34332802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20823343 - 2⁵ = 20823311 is a prime.

It is a super-2 number, since 2×20823343² = 867223227391298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20823347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10411671 + 10411672.

It is an arithmetic number, because the mean of its divisors is an integer number (10411672).

Almost surely, 2^20823343 is an apocalyptic number.

20823343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20823343 is an equidigital number, since it uses as much as digits as its factorization.

20823343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 20823343 is about 4563.2601284608. The cubic root of 20823343 is about 275.1166139037.

The spelling of 20823343 in words is "twenty million, eight hundred twenty-three thousand, three hundred forty-three".