20440024247 has 2 divisors, whose sum is σ = 20440024248. Its totient is φ = 20440024246.

The previous prime is 20440024237. The next prime is 20440024259. The reversal of 20440024247 is 74242004402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20440024247 - 2⁶ = 20440024183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20440024237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220012123 + 10220012124.

It is an arithmetic number, because the mean of its divisors is an integer number (10220012124).

Almost surely, 2^20440024247 is an apocalyptic number.

20440024247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440024247 is an equidigital number, since it uses as much as digits as its factorization.

20440024247 is an evil number, because the sum of its binary digits is even.

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

Adding to 20440024247 its reverse (74242004402), we get a palindrome (94682028649).

The spelling of 20440024247 in words is "twenty billion, four hundred forty million, twenty-four thousand, two hundred forty-seven".