25321420421 has 8 divisors (see below), whose sum is σ = 27660756000. Its totient is φ = 22988316240.

The previous prime is 25321420391. The next prime is 25321420427. The reversal of 25321420421 is 12402412352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25321420421 - 2¹⁸ = 25321158277 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 (25321420427) 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 7 ways as a sum of consecutive naturals, for example, 1549346 + ... + 1565603.

It is an arithmetic number, because the mean of its divisors is an integer number (3457594500).

Almost surely, 2^25321420421 is an apocalyptic number.

It is an amenable number.

25321420421 is a deficient number, since it is larger than the sum of its proper divisors (2339335579).

25321420421 is a wasteful number, since it uses less digits than its factorization.

25321420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115699.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 25321420421 its reverse (12402412352), we get a palindrome (37723832773).

The spelling of 25321420421 in words is "twenty-five billion, three hundred twenty-one million, four hundred twenty thousand, four hundred twenty-one".