20441351421 has 12 divisors (see below), whose sum is σ = 29758889472. Its totient is φ = 13520263176.

The previous prime is 20441351417. The next prime is 20441351431. The reversal of 20441351421 is 12415314402.

20441351421 is a `hidden beast` number, since 204 + 4 + 1 + 35 + 1 + 421 = 666.

It is not a de Polignac number, because 20441351421 - 2² = 20441351417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20441351401) 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 11 ways as a sum of consecutive naturals, for example, 8940831 + ... + 8943116.

It is an arithmetic number, because the mean of its divisors is an integer number (2479907456).

Almost surely, 2^20441351421 is an apocalyptic number.

It is an amenable number.

20441351421 is a deficient number, since it is larger than the sum of its proper divisors (9317538051).

20441351421 is a wasteful number, since it uses less digits than its factorization.

20441351421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17884080 (or 17884077 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 20441351421 its reverse (12415314402), we get a palindrome (32856665823).

The spelling of 20441351421 in words is "twenty billion, four hundred forty-one million, three hundred fifty-one thousand, four hundred twenty-one".