20123589559 has 4 divisors (see below), whose sum is σ = 20137178880. Its totient is φ = 20110000240.

The previous prime is 20123589511. The next prime is 20123589583. The reversal of 20123589559 is 95598532102.

It is a happy number.

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 20123589559 - 2¹¹ = 20123587511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123589509) 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 3 ways as a sum of consecutive naturals, for example, 6792439 + ... + 6795400.

It is an arithmetic number, because the mean of its divisors is an integer number (5034294720).

Almost surely, 2^20123589559 is an apocalyptic number.

20123589559 is a deficient number, since it is larger than the sum of its proper divisors (13589321).

20123589559 is a wasteful number, since it uses less digits than its factorization.

20123589559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13589320.

The product of its (nonzero) digits is 972000, while the sum is 49.

The spelling of 20123589559 in words is "twenty billion, one hundred twenty-three million, five hundred eighty-nine thousand, five hundred fifty-nine".