20077489 has 2 divisors, whose sum is σ = 20077490. Its totient is φ = 20077488.

The previous prime is 20077439. The next prime is 20077511. The reversal of 20077489 is 98477002.

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., 13359025 + 6718464 = 3655^2 + 2592^2 .

It is a cyclic number.

It is not a de Polignac number, because 20077489 - 2⁷ = 20077361 is a prime.

It is not a weakly prime, because it can be changed into another prime (20077439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10038744 + 10038745.

It is an arithmetic number, because the mean of its divisors is an integer number (10038745).

Almost surely, 2^20077489 is an apocalyptic number.

It is an amenable number.

20077489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20077489 is an equidigital number, since it uses as much as digits as its factorization.

20077489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 20077489 is about 4480.7911131853. The cubic root of 20077489 is about 271.7918723970.

The spelling of 20077489 in words is "twenty million, seventy-seven thousand, four hundred eighty-nine".