40020435139 has 2 divisors, whose sum is σ = 40020435140. Its totient is φ = 40020435138.

The previous prime is 40020435121. The next prime is 40020435163. The reversal of 40020435139 is 93153402004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40020435139 - 2¹⁵ = 40020402371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40020435139.

It is not a weakly prime, because it can be changed into another prime (40020436139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010217569 + 20010217570.

It is an arithmetic number, because the mean of its divisors is an integer number (20010217570).

Almost surely, 2^40020435139 is an apocalyptic number.

40020435139 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020435139 is an equidigital number, since it uses as much as digits as its factorization.

40020435139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 40020435139 in words is "forty billion, twenty million, four hundred thirty-five thousand, one hundred thirty-nine".