40020244447 has 2 divisors, whose sum is σ = 40020244448. Its totient is φ = 40020244446.

The previous prime is 40020244373. The next prime is 40020244477. The reversal of 40020244447 is 74444202004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40020244447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40020244477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010122223 + 20010122224.

It is an arithmetic number, because the mean of its divisors is an integer number (20010122224).

Almost surely, 2^40020244447 is an apocalyptic number.

40020244447 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020244447 is an equidigital number, since it uses as much as digits as its factorization.

40020244447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28672, while the sum is 31.

The spelling of 40020244447 in words is "forty billion, twenty million, two hundred forty-four thousand, four hundred forty-seven".