20042134410251 has 2 divisors, whose sum is σ = 20042134410252. Its totient is φ = 20042134410250.

The previous prime is 20042134410247. The next prime is 20042134410283. The reversal of 20042134410251 is 15201443124002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20042134410251 - 2² = 20042134410247 is a prime.

It is not a weakly prime, because it can be changed into another prime (20042134410211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021067205125 + 10021067205126.

It is an arithmetic number, because the mean of its divisors is an integer number (10021067205126).

Almost surely, 2^{20042134410251} is an apocalyptic number.

20042134410251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20042134410251 is an equidigital number, since it uses as much as digits as its factorization.

20042134410251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 20042134410251 its reverse (15201443124002), we get a palindrome (35243577534253).

The spelling of 20042134410251 in words is "twenty trillion, forty-two billion, one hundred thirty-four million, four hundred ten thousand, two hundred fifty-one".