20888897 has 2 divisors, whose sum is σ = 20888898. Its totient is φ = 20888896.

The previous prime is 20888873. The next prime is 20888909. The reversal of 20888897 is 79888802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19439281 + 1449616 = 4409^2 + 1204^2 .

It is a cyclic number.

It is not a de Polignac number, because 20888897 - 2⁸ = 20888641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20888797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10444448 + 10444449.

It is an arithmetic number, because the mean of its divisors is an integer number (10444449).

Almost surely, 2^20888897 is an apocalyptic number.

It is an amenable number.

20888897 is a deficient number, since it is larger than the sum of its proper divisors (1).

20888897 is an equidigital number, since it uses as much as digits as its factorization.

20888897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 50.

The square root of 20888897 is about 4570.4372876126. The cubic root of 20888897 is about 275.4050098352.

The spelling of 20888897 in words is "twenty million, eight hundred eighty-eight thousand, eight hundred ninety-seven".