20459189506 has 8 divisors (see below), whose sum is σ = 35072896320. Its totient is φ = 8768224068.

The previous prime is 20459189501. The next prime is 20459189521. The reversal of 20459189506 is 60598195402.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20459189506.

It is not an unprimeable number, because it can be changed into a prime (20459189501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730685326 + ... + 730685353.

It is an arithmetic number, because the mean of its divisors is an integer number (4384112040).

Almost surely, 2^20459189506 is an apocalyptic number.

20459189506 is a deficient number, since it is larger than the sum of its proper divisors (14613706814).

20459189506 is a wasteful number, since it uses less digits than its factorization.

20459189506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461370688.

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 20459189506 in words is "twenty billion, four hundred fifty-nine million, one hundred eighty-nine thousand, five hundred six".