20200442551 has 2 divisors, whose sum is σ = 20200442552. Its totient is φ = 20200442550.

The previous prime is 20200442539. The next prime is 20200442567. The reversal of 20200442551 is 15524400202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20200442551 - 2⁹ = 20200442039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200442531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100221275 + 10100221276.

It is an arithmetic number, because the mean of its divisors is an integer number (10100221276).

Almost surely, 2^20200442551 is an apocalyptic number.

20200442551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200442551 is an equidigital number, since it uses as much as digits as its factorization.

20200442551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 20200442551 its reverse (15524400202), we get a palindrome (35724842753).

The spelling of 20200442551 in words is "twenty billion, two hundred million, four hundred forty-two thousand, five hundred fifty-one".