20560123463 has 4 divisors (see below), whose sum is σ = 22429225608. Its totient is φ = 18691021320.

The previous prime is 20560123439. The next prime is 20560123469. The reversal of 20560123463 is 36432106502.

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 20560123463 - 2⁶ = 20560123399 is a prime.

It is a super-2 number, since 2×20560123463² (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 (20560123469) 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, 934551056 + ... + 934551077.

It is an arithmetic number, because the mean of its divisors is an integer number (5607306402).

Almost surely, 2^20560123463 is an apocalyptic number.

20560123463 is a deficient number, since it is larger than the sum of its proper divisors (1869102145).

20560123463 is a wasteful number, since it uses less digits than its factorization.

20560123463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869102144.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 20560123463 its reverse (36432106502), we get a palindrome (56992229965).

The spelling of 20560123463 in words is "twenty billion, five hundred sixty million, one hundred twenty-three thousand, four hundred sixty-three".