20015312239 has 4 divisors (see below), whose sum is σ = 21554951656. Its totient is φ = 18475672824.

The previous prime is 20015312237. The next prime is 20015312243. The reversal of 20015312239 is 93221351002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20015312239 - 2¹ = 20015312237 is a prime.

It is a super-2 number, since 2×20015312239² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015312237) 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 3 ways as a sum of consecutive naturals, for example, 769819689 + ... + 769819714.

It is an arithmetic number, because the mean of its divisors is an integer number (5388737914).

Almost surely, 2^20015312239 is an apocalyptic number.

20015312239 is a deficient number, since it is larger than the sum of its proper divisors (1539639417).

20015312239 is a wasteful number, since it uses less digits than its factorization.

20015312239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539639416.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 20015312239 in words is "twenty billion, fifteen million, three hundred twelve thousand, two hundred thirty-nine".