20480377 has 2 divisors, whose sum is σ = 20480378. Its totient is φ = 20480376.

The previous prime is 20480371. The next prime is 20480381. The reversal of 20480377 is 77308402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14891881 + 5588496 = 3859^2 + 2364^2 .

It is a cyclic number.

It is not a de Polignac number, because 20480377 - 2⁷ = 20480249 is a prime.

It is not a weakly prime, because it can be changed into another prime (20480371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10240188 + 10240189.

It is an arithmetic number, because the mean of its divisors is an integer number (10240189).

Almost surely, 2^20480377 is an apocalyptic number.

It is an amenable number.

20480377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20480377 is an equidigital number, since it uses as much as digits as its factorization.

20480377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 20480377 is about 4525.5250524110. The cubic root of 20480377 is about 273.5978302625.

Adding to 20480377 its reverse (77308402), we get a palindrome (97788779).

The spelling of 20480377 in words is "twenty million, four hundred eighty thousand, three hundred seventy-seven".