20391359219 has 8 divisors (see below), whose sum is σ = 25422993408. Its totient is φ = 15889370760.

The previous prime is 20391359173. The next prime is 20391359239. The reversal of 20391359219 is 91295319302.

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 20391359219 - 2²⁴ = 20374582003 is a prime.

It is a super-2 number, since 2×20391359219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20391359219.

It is not an unprimeable number, because it can be changed into a prime (20391359239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132411347 + ... + 132411500.

It is an arithmetic number, because the mean of its divisors is an integer number (3177874176).

Almost surely, 2^20391359219 is an apocalyptic number.

20391359219 is a deficient number, since it is larger than the sum of its proper divisors (5031634189).

20391359219 is a wasteful number, since it uses less digits than its factorization.

20391359219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264822865.

The product of its (nonzero) digits is 131220, while the sum is 44.

The spelling of 20391359219 in words is "twenty billion, three hundred ninety-one million, three hundred fifty-nine thousand, two hundred nineteen".