40084343021 has 2 divisors, whose sum is σ = 40084343022. Its totient is φ = 40084343020.

The previous prime is 40084342957. The next prime is 40084343069. The reversal of 40084343021 is 12034348004.

40084343021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22991656900 + 17092686121 = 151630^2 + 130739^2 .

It is a cyclic number.

It is not a de Polignac number, because 40084343021 - 2⁶ = 40084342957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40084343071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20042171510 + 20042171511.

It is an arithmetic number, because the mean of its divisors is an integer number (20042171511).

Almost surely, 2^40084343021 is an apocalyptic number.

It is an amenable number.

40084343021 is a deficient number, since it is larger than the sum of its proper divisors (1).

40084343021 is an equidigital number, since it uses as much as digits as its factorization.

40084343021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 29.

The spelling of 40084343021 in words is "forty billion, eighty-four million, three hundred forty-three thousand, twenty-one".