20143421434111 has 8 divisors (see below), whose sum is σ = 21331357005744. Its totient is φ = 18955822354560.

The previous prime is 20143421434061. The next prime is 20143421434121. The reversal of 20143421434111 is 11143412434102.

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 20143421434111 - 2³⁹ = 19593665620223 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 (20143421434121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83999760 + ... + 84239221.

It is an arithmetic number, because the mean of its divisors is an integer number (2666419625718).

Almost surely, 2^{20143421434111} is an apocalyptic number.

20143421434111 is a deficient number, since it is larger than the sum of its proper divisors (1187935571633).

20143421434111 is a wasteful number, since it uses less digits than its factorization.

20143421434111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168246041.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 20143421434111 its reverse (11143412434102), we get a palindrome (31286833868213).

Subtracting from 20143421434111 its reverse (11143412434102), we obtain a palindrome (9000009000009).

The spelling of 20143421434111 in words is "twenty trillion, one hundred forty-three billion, four hundred twenty-one million, four hundred thirty-four thousand, one hundred eleven".