25420042343 has 2 divisors, whose sum is σ = 25420042344. Its totient is φ = 25420042342.

The previous prime is 25420042337. The next prime is 25420042369. The reversal of 25420042343 is 34324002452.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25420042343 - 2⁶ = 25420042279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25420042303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12710021171 + 12710021172.

It is an arithmetic number, because the mean of its divisors is an integer number (12710021172).

Almost surely, 2^25420042343 is an apocalyptic number.

25420042343 is a deficient number, since it is larger than the sum of its proper divisors (1).

25420042343 is an equidigital number, since it uses as much as digits as its factorization.

25420042343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 29.

Adding to 25420042343 its reverse (34324002452), we get a palindrome (59744044795).

The spelling of 25420042343 in words is "twenty-five billion, four hundred twenty million, forty-two thousand, three hundred forty-three".