20024240477 has 2 divisors, whose sum is σ = 20024240478. Its totient is φ = 20024240476.

The previous prime is 20024240393. The next prime is 20024240501. The reversal of 20024240477 is 77404242002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18755028601 + 1269211876 = 136949^2 + 35626^2 .

It is a cyclic number.

It is not a de Polignac number, because 20024240477 - 2¹⁴ = 20024224093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20024240777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10012120238 + 10012120239.

It is an arithmetic number, because the mean of its divisors is an integer number (10012120239).

Almost surely, 2^20024240477 is an apocalyptic number.

It is an amenable number.

20024240477 is a deficient number, since it is larger than the sum of its proper divisors (1).

20024240477 is an equidigital number, since it uses as much as digits as its factorization.

20024240477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 32.

Adding to 20024240477 its reverse (77404242002), we get a palindrome (97428482479).

The spelling of 20024240477 in words is "twenty billion, twenty-four million, two hundred forty thousand, four hundred seventy-seven".