20623813963 has 4 divisors (see below), whose sum is σ = 20914290288. Its totient is φ = 20333337640.

The previous prime is 20623813961. The next prime is 20623813997. The reversal of 20623813963 is 36931832602.

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 20623813963 - 2¹ = 20623813961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20623813961) 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, 145238056 + ... + 145238197.

It is an arithmetic number, because the mean of its divisors is an integer number (5228572572).

Almost surely, 2^20623813963 is an apocalyptic number.

20623813963 is a deficient number, since it is larger than the sum of its proper divisors (290476325).

20623813963 is an equidigital number, since it uses as much as digits as its factorization.

20623813963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290476324.

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 20623813963 in words is "twenty billion, six hundred twenty-three million, eight hundred thirteen thousand, nine hundred sixty-three".