25913700021 has 16 divisors (see below), whose sum is σ = 37770075648. Its totient is φ = 15673014000.

The previous prime is 25913699909. The next prime is 25913700103. The reversal of 25913700021 is 12000731952.

It is not a de Polignac number, because 25913700021 - 2¹⁵ = 25913667253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25913700521) 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 15 ways as a sum of consecutive naturals, for example, 790155 + ... + 822296.

It is an arithmetic number, because the mean of its divisors is an integer number (2360629728).

Almost surely, 2^25913700021 is an apocalyptic number.

It is an amenable number.

25913700021 is a deficient number, since it is larger than the sum of its proper divisors (11856375627).

25913700021 is a wasteful number, since it uses less digits than its factorization.

25913700021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612952.

The product of its (nonzero) digits is 3780, while the sum is 30.

The spelling of 25913700021 in words is "twenty-five billion, nine hundred thirteen million, seven hundred thousand, twenty-one".