40020403309 has 2 divisors, whose sum is σ = 40020403310. Its totient is φ = 40020403308.

The previous prime is 40020403301. The next prime is 40020403331. The reversal of 40020403309 is 90330402004.

40020403309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39838962409 + 181440900 = 199597^2 + 13470^2 .

It is a cyclic number.

It is not a de Polignac number, because 40020403309 - 2³ = 40020403301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40020403301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010201654 + 20010201655.

It is an arithmetic number, because the mean of its divisors is an integer number (20010201655).

Almost surely, 2^40020403309 is an apocalyptic number.

It is an amenable number.

40020403309 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020403309 is an equidigital number, since it uses as much as digits as its factorization.

40020403309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The spelling of 40020403309 in words is "forty billion, twenty million, four hundred three thousand, three hundred nine".