20623643319 has 4 divisors (see below), whose sum is σ = 27498191096. Its totient is φ = 13749095544.

The previous prime is 20623643153. The next prime is 20623643321. The reversal of 20623643319 is 91334632602.

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

It is not a de Polignac number, because 20623643319 - 2⁸ = 20623643063 is a prime.

It is a super-2 number, since 2×20623643319² (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 (20623643329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3437273884 + ... + 3437273889.

It is an arithmetic number, because the mean of its divisors is an integer number (6874547774).

Almost surely, 2^20623643319 is an apocalyptic number.

20623643319 is a deficient number, since it is larger than the sum of its proper divisors (6874547777).

20623643319 is an equidigital number, since it uses as much as digits as its factorization.

20623643319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6874547776.

The product of its (nonzero) digits is 139968, while the sum is 39.

The spelling of 20623643319 in words is "twenty billion, six hundred twenty-three million, six hundred forty-three thousand, three hundred nineteen".