25530020413 has 4 divisors (see below), whose sum is σ = 25556313888. Its totient is φ = 25503726940.

The previous prime is 25530020407. The next prime is 25530020437. The reversal of 25530020413 is 31402003552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25530020413 - 2⁹ = 25530019901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25530023413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13145281 + ... + 13147222.

It is an arithmetic number, because the mean of its divisors is an integer number (6389078472).

Almost surely, 2^25530020413 is an apocalyptic number.

It is an amenable number.

25530020413 is a deficient number, since it is larger than the sum of its proper divisors (26293475).

25530020413 is an equidigital number, since it uses as much as digits as its factorization.

25530020413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26293474.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 25530020413 its reverse (31402003552), we get a palindrome (56932023965).

The spelling of 25530020413 in words is "twenty-five billion, five hundred thirty million, twenty thousand, four hundred thirteen".