20631013463 has 4 divisors (see below), whose sum is σ = 20638252728. Its totient is φ = 20623774200.

The previous prime is 20631013433. The next prime is 20631013519. The reversal of 20631013463 is 36431013602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20631013463 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 (20631013433) 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 3 ways as a sum of consecutive naturals, for example, 3615356 + ... + 3621057.

It is an arithmetic number, because the mean of its divisors is an integer number (5159563182).

Almost surely, 2^20631013463 is an apocalyptic number.

20631013463 is a deficient number, since it is larger than the sum of its proper divisors (7239265).

20631013463 is an equidigital number, since it uses as much as digits as its factorization.

20631013463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7239264.

The product of its (nonzero) digits is 7776, while the sum is 29.

The spelling of 20631013463 in words is "twenty billion, six hundred thirty-one million, thirteen thousand, four hundred sixty-three".