20024442397 has 2 divisors, whose sum is σ = 20024442398. Its totient is φ = 20024442396.

The previous prime is 20024442391. The next prime is 20024442407. The reversal of 20024442397 is 79324442002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19913160996 + 111281401 = 141114^2 + 10549^2 .

It is a cyclic number.

It is not a de Polignac number, because 20024442397 - 2¹¹ = 20024440349 is a prime.

It is a super-2 number, since 2×20024442397² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20024442391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10012221198 + 10012221199.

It is an arithmetic number, because the mean of its divisors is an integer number (10012221199).

Almost surely, 2^20024442397 is an apocalyptic number.

It is an amenable number.

20024442397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20024442397 is an equidigital number, since it uses as much as digits as its factorization.

20024442397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 37.

Adding to 20024442397 its reverse (79324442002), we get a palindrome (99348884399).

The spelling of 20024442397 in words is "twenty billion, twenty-four million, four hundred forty-two thousand, three hundred ninety-seven".