20525054251 has 4 divisors (see below), whose sum is σ = 22103904592. Its totient is φ = 18946203912.

The previous prime is 20525054219. The next prime is 20525054257. The reversal of 20525054251 is 15245052502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20525054251 - 2⁵ = 20525054219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20525054257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789425151 + ... + 789425176.

It is an arithmetic number, because the mean of its divisors is an integer number (5525976148).

Almost surely, 2^20525054251 is an apocalyptic number.

20525054251 is a deficient number, since it is larger than the sum of its proper divisors (1578850341).

20525054251 is a wasteful number, since it uses less digits than its factorization.

20525054251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578850340.

The product of its (nonzero) digits is 20000, while the sum is 31.

The spelling of 20525054251 in words is "twenty billion, five hundred twenty-five million, fifty-four thousand, two hundred fifty-one".