20380897 has 2 divisors, whose sum is σ = 20380898. Its totient is φ = 20380896.

The previous prime is 20380889. The next prime is 20380903. The reversal of 20380897 is 79808302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12138256 + 8242641 = 3484^2 + 2871^2 .

It is a cyclic number.

It is not a de Polignac number, because 20380897 - 2³ = 20380889 is a prime.

It is not a weakly prime, because it can be changed into another prime (20380837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10190448 + 10190449.

It is an arithmetic number, because the mean of its divisors is an integer number (10190449).

Almost surely, 2^20380897 is an apocalyptic number.

It is an amenable number.

20380897 is a deficient number, since it is larger than the sum of its proper divisors (1).

20380897 is an equidigital number, since it uses as much as digits as its factorization.

20380897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20380897 is about 4514.5206833063. The cubic root of 20380897 is about 273.1541258712.

The spelling of 20380897 in words is "twenty million, three hundred eighty thousand, eight hundred ninety-seven".