40374067021 has 2 divisors, whose sum is σ = 40374067022. Its totient is φ = 40374067020.

The previous prime is 40374067007. The next prime is 40374067117. The reversal of 40374067021 is 12076047304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33078515625 + 7295551396 = 181875^2 + 85414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40374067021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40374067121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20187033510 + 20187033511.

It is an arithmetic number, because the mean of its divisors is an integer number (20187033511).

Almost surely, 2^40374067021 is an apocalyptic number.

It is an amenable number.

40374067021 is a deficient number, since it is larger than the sum of its proper divisors (1).

40374067021 is an equidigital number, since it uses as much as digits as its factorization.

40374067021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 34.

The spelling of 40374067021 in words is "forty billion, three hundred seventy-four million, sixty-seven thousand, twenty-one".