20618758319 has 8 divisors (see below), whose sum is σ = 21518477280. Its totient is φ = 19719310336.

The previous prime is 20618758297. The next prime is 20618758327. The reversal of 20618758319 is 91385781602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20618758319 - 2¹² = 20618754223 is a prime.

It is a super-2 number, since 2×20618758319² (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 (20618758399) 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 7 ways as a sum of consecutive naturals, for example, 96227 + ... + 224715.

It is an arithmetic number, because the mean of its divisors is an integer number (2689809660).

Almost surely, 2^20618758319 is an apocalyptic number.

20618758319 is a deficient number, since it is larger than the sum of its proper divisors (899718961).

20618758319 is a wasteful number, since it uses less digits than its factorization.

20618758319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135489.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 20618758319 in words is "twenty billion, six hundred eighteen million, seven hundred fifty-eight thousand, three hundred nineteen".