20446025387 has 2 divisors, whose sum is σ = 20446025388. Its totient is φ = 20446025386.

The previous prime is 20446025363. The next prime is 20446025449. The reversal of 20446025387 is 78352064402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20446025387 is a prime.

It is not a weakly prime, because it can be changed into another prime (20446025087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10223012693 + 10223012694.

It is an arithmetic number, because the mean of its divisors is an integer number (10223012694).

Almost surely, 2^20446025387 is an apocalyptic number.

20446025387 is a deficient number, since it is larger than the sum of its proper divisors (1).

20446025387 is an equidigital number, since it uses as much as digits as its factorization.

20446025387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 41.

Adding to 20446025387 its reverse (78352064402), we get a palindrome (98798089789).

The spelling of 20446025387 in words is "twenty billion, four hundred forty-six million, twenty-five thousand, three hundred eighty-seven".