20239349761 has 16 divisors (see below), whose sum is σ = 21242960640. Its totient is φ = 19260339840.

The previous prime is 20239349699. The next prime is 20239349783. The reversal of 20239349761 is 16794393202.

It is a cyclic number.

It is not a de Polignac number, because 20239349761 - 2¹³ = 20239341569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20239340761) 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 in 15 ways as a sum of consecutive naturals, for example, 3438541 + ... + 3444421.

It is an arithmetic number, because the mean of its divisors is an integer number (1327685040).

Almost surely, 2^20239349761 is an apocalyptic number.

It is an amenable number.

20239349761 is a deficient number, since it is larger than the sum of its proper divisors (1003610879).

20239349761 is a wasteful number, since it uses less digits than its factorization.

20239349761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7944.

The product of its (nonzero) digits is 489888, while the sum is 46.

The spelling of 20239349761 in words is "twenty billion, two hundred thirty-nine million, three hundred forty-nine thousand, seven hundred sixty-one".