20923517443 has 2 divisors, whose sum is σ = 20923517444. Its totient is φ = 20923517442.

The previous prime is 20923517437. The next prime is 20923517467. The reversal of 20923517443 is 34471532902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20923517443 - 2⁵ = 20923517411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20923517396 and 20923517405.

It is not a weakly prime, because it can be changed into another prime (20923517143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10461758721 + 10461758722.

It is an arithmetic number, because the mean of its divisors is an integer number (10461758722).

Almost surely, 2^20923517443 is an apocalyptic number.

20923517443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20923517443 is an equidigital number, since it uses as much as digits as its factorization.

20923517443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 20923517443 in words is "twenty billion, nine hundred twenty-three million, five hundred seventeen thousand, four hundred forty-three".