25411842021 has 4 divisors (see below), whose sum is σ = 33882456032. Its totient is φ = 16941228012.

The previous prime is 25411842007. The next prime is 25411842023. The reversal of 25411842021 is 12024811452.

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 not a de Polignac number, because 25411842021 - 2⁹ = 25411841509 is a prime.

It is a super-2 number, since 2×25411842021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25411842021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25411842023) 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, 4235307001 + ... + 4235307006.

It is an arithmetic number, because the mean of its divisors is an integer number (8470614008).

Almost surely, 2^25411842021 is an apocalyptic number.

It is an amenable number.

25411842021 is a deficient number, since it is larger than the sum of its proper divisors (8470614011).

25411842021 is an equidigital number, since it uses as much as digits as its factorization.

25411842021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8470614010.

The product of its (nonzero) digits is 5120, while the sum is 30.

The spelling of 25411842021 in words is "twenty-five billion, four hundred eleven million, eight hundred forty-two thousand, twenty-one".