20412500425421 has 8 divisors (see below), whose sum is σ = 21984517375800. Its totient is φ = 18840744133632.

The previous prime is 20412500425357. The next prime is 20412500425441. The reversal of 20412500425421 is 12452400521402.

It can be written as a sum of positive squares in 4 ways, for example, as 9084949225 + 20403415476196 = 95315^2 + 4517014^2 .

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 20412500425421 - 2⁶ = 20412500425357 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 (20412500425441) 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 7 ways as a sum of consecutive naturals, for example, 65001980 + ... + 65315253.

It is an arithmetic number, because the mean of its divisors is an integer number (2748064671975).

Almost surely, 2^{20412500425421} is an apocalyptic number.

It is an amenable number.

20412500425421 is a deficient number, since it is larger than the sum of its proper divisors (1572016950379).

20412500425421 is a wasteful number, since it uses less digits than its factorization.

20412500425421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130329295.

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 20412500425421 its reverse (12452400521402), we get a palindrome (32864900946823).

The spelling of 20412500425421 in words is "twenty trillion, four hundred twelve billion, five hundred million, four hundred twenty-five thousand, four hundred twenty-one".