25020920687 has 4 divisors (see below), whose sum is σ = 28595337936. Its totient is φ = 21446503440.

The previous prime is 25020920657. The next prime is 25020920723. The reversal of 25020920687 is 78602902052.

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 25020920687 - 2⁶ = 25020920623 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 (25020920657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1787208614 + ... + 1787208627.

It is an arithmetic number, because the mean of its divisors is an integer number (7148834484).

Almost surely, 2^25020920687 is an apocalyptic number.

25020920687 is a deficient number, since it is larger than the sum of its proper divisors (3574417249).

25020920687 is an equidigital number, since it uses as much as digits as its factorization.

25020920687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574417248.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 25020920687 in words is "twenty-five billion, twenty million, nine hundred twenty thousand, six hundred eighty-seven".