20459189513 has 8 divisors (see below), whose sum is σ = 23530861632. Its totient is φ = 17424750096.

The previous prime is 20459189501. The next prime is 20459189521. The reversal of 20459189513 is 31598195402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20459189513 is a prime.

It is a super-3 number, since 3×20459189513³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20459189573) 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 7 ways as a sum of consecutive naturals, for example, 9306995 + ... + 9309192.

It is an arithmetic number, because the mean of its divisors is an integer number (2941357704).

Almost surely, 2^20459189513 is an apocalyptic number.

It is an amenable number.

20459189513 is a deficient number, since it is larger than the sum of its proper divisors (3071672119).

20459189513 is a wasteful number, since it uses less digits than its factorization.

20459189513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18616351.

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 20459189513 in words is "twenty billion, four hundred fifty-nine million, one hundred eighty-nine thousand, five hundred thirteen".