20024404247 has 4 divisors (see below), whose sum is σ = 21078320280. Its totient is φ = 18970488216.

The previous prime is 20024404243. The next prime is 20024404291. The reversal of 20024404247 is 74240442002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74240442002 = 2 ⋅37120221001.

It is a cyclic number.

It is not a de Polignac number, because 20024404247 - 2² = 20024404243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20024404241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526957988 + ... + 526958025.

It is an arithmetic number, because the mean of its divisors is an integer number (5269580070).

Almost surely, 2^20024404247 is an apocalyptic number.

20024404247 is a deficient number, since it is larger than the sum of its proper divisors (1053916033).

20024404247 is a wasteful number, since it uses less digits than its factorization.

20024404247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053916032.

The product of its (nonzero) digits is 14336, while the sum is 29.

Adding to 20024404247 its reverse (74240442002), we get a palindrome (94264846249).

The spelling of 20024404247 in words is "twenty billion, twenty-four million, four hundred four thousand, two hundred forty-seven".