20400104143 has 16 divisors (see below), whose sum is σ = 21917952000. Its totient is φ = 18950761312.

The previous prime is 20400104141. The next prime is 20400104147. The reversal of 20400104143 is 34140100402.

It is not a de Polignac number, because 20400104143 - 2¹ = 20400104141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20400104143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400104141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46423 + ... + 207256.

It is an arithmetic number, because the mean of its divisors is an integer number (1369872000).

Almost surely, 2^20400104143 is an apocalyptic number.

20400104143 is a deficient number, since it is larger than the sum of its proper divisors (1517847857).

20400104143 is a wasteful number, since it uses less digits than its factorization.

20400104143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253814.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20400104143 its reverse (34140100402), we get a palindrome (54540204545).

The spelling of 20400104143 in words is "twenty billion, four hundred million, one hundred four thousand, one hundred forty-three".