20623643141 has 4 divisors (see below), whose sum is σ = 21288921984. Its totient is φ = 19958364300.

The previous prime is 20623643129. The next prime is 20623643153. The reversal of 20623643141 is 14134632602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14134632602 = 2 ⋅7067316301.

It is an interprime number because it is at equal distance from previous prime (20623643129) and next prime (20623643153).

It is a cyclic number.

It is not a de Polignac number, because 20623643141 - 2⁶ = 20623643077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20623643098 and 20623643107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20623643111) 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, 332639375 + ... + 332639436.

It is an arithmetic number, because the mean of its divisors is an integer number (5322230496).

Almost surely, 2^20623643141 is an apocalyptic number.

It is an amenable number.

20623643141 is a deficient number, since it is larger than the sum of its proper divisors (665278843).

20623643141 is an equidigital number, since it uses as much as digits as its factorization.

20623643141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665278842.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 20623643141 in words is "twenty billion, six hundred twenty-three million, six hundred forty-three thousand, one hundred forty-one".