20433943 has 2 divisors, whose sum is σ = 20433944. Its totient is φ = 20433942.

The previous prime is 20433887. The next prime is 20433967. The reversal of 20433943 is 34933402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20433943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20433043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216971 + 10216972.

It is an arithmetic number, because the mean of its divisors is an integer number (10216972).

Almost surely, 2^20433943 is an apocalyptic number.

20433943 is a deficient number, since it is larger than the sum of its proper divisors (1).

20433943 is an equidigital number, since it uses as much as digits as its factorization.

20433943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 20433943 is about 4520.3919077885. The cubic root of 20433943 is about 273.3909028385.

The spelling of 20433943 in words is "twenty million, four hundred thirty-three thousand, nine hundred forty-three".