20343450035421 has 80 divisors (see below), whose sum is σ = 32627451846528. Its totient is φ = 12600464025600.

The previous prime is 20343450035399. The next prime is 20343450035443. The reversal of 20343450035421 is 12453005434302.

20343450035421 is a `hidden beast` number, since 2 + 0 + 34 + 34 + 50 + 0 + 3 + 542 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (20343450035399) and next prime (20343450035443).

It is not a de Polignac number, because 20343450035421 - 2⁶ = 20343450035357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343950035421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 16752301 + ... + 17925581.

Almost surely, 2^{20343450035421} is an apocalyptic number.

It is an amenable number.

20343450035421 is a deficient number, since it is larger than the sum of its proper divisors (12284001811107).

20343450035421 is a wasteful number, since it uses less digits than its factorization.

20343450035421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173584 (or 1173575 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

Adding to 20343450035421 its reverse (12453005434302), we get a palindrome (32796455469723).

The spelling of 20343450035421 in words is "twenty trillion, three hundred forty-three billion, four hundred fifty million, thirty-five thousand, four hundred twenty-one".