25705022013 has 12 divisors (see below), whose sum is σ = 40504883328. Its totient is φ = 15578801160.

The previous prime is 25705021961. The next prime is 25705022027. The reversal of 25705022013 is 31022050752.

It is not a de Polignac number, because 25705022013 - 2¹⁸ = 25704759869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25705022033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129823245 + ... + 129823442.

It is an arithmetic number, because the mean of its divisors is an integer number (3375406944).

Almost surely, 2^25705022013 is an apocalyptic number.

It is an amenable number.

25705022013 is a deficient number, since it is larger than the sum of its proper divisors (14799861315).

25705022013 is a wasteful number, since it uses less digits than its factorization.

25705022013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259646704 (or 259646701 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

Adding to 25705022013 its reverse (31022050752), we get a palindrome (56727072765).

The spelling of 25705022013 in words is "twenty-five billion, seven hundred five million, twenty-two thousand, thirteen".