20042225887 has 2 divisors, whose sum is σ = 20042225888. Its totient is φ = 20042225886.

The previous prime is 20042225869. The next prime is 20042225899. The reversal of 20042225887 is 78852224002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20042225887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20042225587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021112943 + 10021112944.

It is an arithmetic number, because the mean of its divisors is an integer number (10021112944).

Almost surely, 2^20042225887 is an apocalyptic number.

20042225887 is a deficient number, since it is larger than the sum of its proper divisors (1).

20042225887 is an equidigital number, since it uses as much as digits as its factorization.

20042225887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 143360, while the sum is 40.

Adding to 20042225887 its reverse (78852224002), we get a palindrome (98894449889).

It can be divided in two parts, 20042 and 225887, that multiplied together give a palindrome (4527227254).

The spelling of 20042225887 in words is "twenty billion, forty-two million, two hundred twenty-five thousand, eight hundred eighty-seven".