25340420015 has 4 divisors (see below), whose sum is σ = 30408504024. Its totient is φ = 20272336008.

The previous prime is 25340419991. The next prime is 25340420057. The reversal of 25340420015 is 51002404352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25340420015 - 2¹⁰ = 25340418991 is a prime.

It is a super-2 number, since 2×25340420015² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2534041997 + ... + 2534042006.

It is an arithmetic number, because the mean of its divisors is an integer number (7602126006).

Almost surely, 2^25340420015 is an apocalyptic number.

25340420015 is a deficient number, since it is larger than the sum of its proper divisors (5068084009).

25340420015 is an equidigital number, since it uses as much as digits as its factorization.

25340420015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5068084008.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 25340420015 its reverse (51002404352), we get a palindrome (76342824367).

The spelling of 25340420015 in words is "twenty-five billion, three hundred forty million, four hundred twenty thousand, fifteen".