20886753497 has 2 divisors, whose sum is σ = 20886753498. Its totient is φ = 20886753496.

The previous prime is 20886753473. The next prime is 20886753499. The reversal of 20886753497 is 79435768802.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17155498441 + 3731255056 = 130979^2 + 61084^2 .

It is a cyclic number.

It is not a de Polignac number, because 20886753497 - 2¹⁰ = 20886752473 is a prime.

Together with 20886753499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20886753499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10443376748 + 10443376749.

It is an arithmetic number, because the mean of its divisors is an integer number (10443376749).

Almost surely, 2^20886753497 is an apocalyptic number.

It is an amenable number.

20886753497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20886753497 is an equidigital number, since it uses as much as digits as its factorization.

20886753497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 20886753497 in words is "twenty billion, eight hundred eighty-six million, seven hundred fifty-three thousand, four hundred ninety-seven".