40020433 has 2 divisors, whose sum is σ = 40020434. Its totient is φ = 40020432.

The previous prime is 40020389. The next prime is 40020443. The reversal of 40020433 is 33402004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39853969 + 166464 = 6313^2 + 408^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40020433 is a prime.

It is not a weakly prime, because it can be changed into another prime (40020443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010216 + 20010217.

It is an arithmetic number, because the mean of its divisors is an integer number (20010217).

Almost surely, 2^40020433 is an apocalyptic number.

It is an amenable number.

40020433 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020433 is an equidigital number, since it uses as much as digits as its factorization.

40020433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 40020433 is about 6326.1704845823. The cubic root of 40020433 is about 342.0534126534.

Adding to 40020433 its reverse (33402004), we get a palindrome (73422437).

The spelling of 40020433 in words is "forty million, twenty thousand, four hundred thirty-three".