20442240399 has 32 divisors (see below), whose sum is σ = 31577978880. Its totient is φ = 11521289952.

The previous prime is 20442240361. The next prime is 20442240419. The reversal of 20442240399 is 99304224402.

It is not a de Polignac number, because 20442240399 - 2⁹ = 20442239887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442240349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1069444 + ... + 1088390.

It is an arithmetic number, because the mean of its divisors is an integer number (986811840).

Almost surely, 2^20442240399 is an apocalyptic number.

20442240399 is a deficient number, since it is larger than the sum of its proper divisors (11135738481).

20442240399 is a wasteful number, since it uses less digits than its factorization.

20442240399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19659.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 20442240399 in words is "twenty billion, four hundred forty-two million, two hundred forty thousand, three hundred ninety-nine".