25627020421 has 4 divisors (see below), whose sum is σ = 25721585344. Its totient is φ = 25532455500.

The previous prime is 25627020407. The next prime is 25627020437. The reversal of 25627020421 is 12402072652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25627020421 - 2⁵ = 25627020389 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 (25627020721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47282055 + ... + 47282596.

It is an arithmetic number, because the mean of its divisors is an integer number (6430396336).

Almost surely, 2^25627020421 is an apocalyptic number.

It is an amenable number.

25627020421 is a deficient number, since it is larger than the sum of its proper divisors (94564923).

25627020421 is an equidigital number, since it uses as much as digits as its factorization.

25627020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94564922.

The product of its (nonzero) digits is 13440, while the sum is 31.

The spelling of 25627020421 in words is "twenty-five billion, six hundred twenty-seven million, twenty thousand, four hundred twenty-one".