20880705851 has 2 divisors, whose sum is σ = 20880705852. Its totient is φ = 20880705850.

The previous prime is 20880705829. The next prime is 20880705863. The reversal of 20880705851 is 15850708802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20880705851 - 2¹⁰ = 20880704827 is a prime.

It is not a weakly prime, because it can be changed into another prime (20880705451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10440352925 + 10440352926.

It is an arithmetic number, because the mean of its divisors is an integer number (10440352926).

Almost surely, 2^20880705851 is an apocalyptic number.

20880705851 is a deficient number, since it is larger than the sum of its proper divisors (1).

20880705851 is an equidigital number, since it uses as much as digits as its factorization.

20880705851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 179200, while the sum is 44.

The spelling of 20880705851 in words is "twenty billion, eight hundred eighty million, seven hundred five thousand, eight hundred fifty-one".