25236420813 has 24 divisors (see below), whose sum is σ = 36599472000. Its totient is φ = 16756637184.

The previous prime is 25236420809. The next prime is 25236420851. The reversal of 25236420813 is 31802463252.

25236420813 is a `hidden beast` number, since 2 + 5 + 2 + 3 + 642 + 0 + 8 + 1 + 3 = 666.

It is not a de Polignac number, because 25236420813 - 2² = 25236420809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25236420613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2366748 + ... + 2377386.

It is an arithmetic number, because the mean of its divisors is an integer number (1524978000).

Almost surely, 2^25236420813 is an apocalyptic number.

It is an amenable number.

25236420813 is a deficient number, since it is larger than the sum of its proper divisors (11363051187).

25236420813 is a wasteful number, since it uses less digits than its factorization.

25236420813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11681 (or 11678 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 25236420813 in words is "twenty-five billion, two hundred thirty-six million, four hundred twenty thousand, eight hundred thirteen".