25520434420013 has 8 divisors (see below), whose sum is σ = 27483686045088. Its totient is φ = 23557202978544.

The previous prime is 25520434420003. The next prime is 25520434420067. The reversal of 25520434420013 is 31002443402552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25520434420013 - 2¹⁰ = 25520434418989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25520434420003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2367131 + ... + 7526232.

It is an arithmetic number, because the mean of its divisors is an integer number (3435460755636).

Almost surely, 2^{25520434420013} is an apocalyptic number.

It is an amenable number.

25520434420013 is a deficient number, since it is larger than the sum of its proper divisors (1963251625075).

25520434420013 is a wasteful number, since it uses less digits than its factorization.

25520434420013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10091803.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 25520434420013 its reverse (31002443402552), we get a palindrome (56522877822565).

The spelling of 25520434420013 in words is "twenty-five trillion, five hundred twenty billion, four hundred thirty-four million, four hundred twenty thousand, thirteen".