25180013 has 4 divisors (see below), whose sum is σ = 25202688. Its totient is φ = 25157340.

The previous prime is 25179991. The next prime is 25180019. The reversal of 25180013 is 31008152.

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 25180013 - 2¹⁴ = 25163629 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 (25180019) 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, 9581 + ... + 11922.

It is an arithmetic number, because the mean of its divisors is an integer number (6300672).

Almost surely, 2^25180013 is an apocalyptic number.

It is an amenable number.

25180013 is a deficient number, since it is larger than the sum of its proper divisors (22675).

25180013 is a wasteful number, since it uses less digits than its factorization.

25180013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22674.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 25180013 is about 5017.9690114627. The cubic root of 25180013 is about 293.1019109901.

Adding to 25180013 its reverse (31008152), we get a palindrome (56188165).

The spelling of 25180013 in words is "twenty-five million, one hundred eighty thousand, thirteen".