20252421414551 has 2 divisors, whose sum is σ = 20252421414552. Its totient is φ = 20252421414550.

The previous prime is 20252421414517. The next prime is 20252421414611. The reversal of 20252421414551 is 15541412425202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20252421414551 - 2¹⁰ = 20252421413527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20252421414851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10126210707275 + 10126210707276.

It is an arithmetic number, because the mean of its divisors is an integer number (10126210707276).

Almost surely, 2^{20252421414551} is an apocalyptic number.

20252421414551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20252421414551 is an equidigital number, since it uses as much as digits as its factorization.

20252421414551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128000, while the sum is 38.

Adding to 20252421414551 its reverse (15541412425202), we get a palindrome (35793833839753).

The spelling of 20252421414551 in words is "twenty trillion, two hundred fifty-two billion, four hundred twenty-one million, four hundred fourteen thousand, five hundred fifty-one".