2040021439 has 2 divisors, whose sum is σ = 2040021440. Its totient is φ = 2040021438.

The previous prime is 2040021413. The next prime is 2040021457. The reversal of 2040021439 is 9341200402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2040021439 - 2¹⁹ = 2039497151 is a prime.

It is a super-4 number, since 4×2040021439⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2040021239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020010719 + 1020010720.

It is an arithmetic number, because the mean of its divisors is an integer number (1020010720).

Almost surely, 2^2040021439 is an apocalyptic number.

2040021439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040021439 is an equidigital number, since it uses as much as digits as its factorization.

2040021439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2040021439 is about 45166.5964956404. The cubic root of 2040021439 is about 1268.2695839269.

The spelling of 2040021439 in words is "two billion, forty million, twenty-one thousand, four hundred thirty-nine".