20143440234 has 16 divisors (see below), whose sum is σ = 44763200640. Its totient is φ = 6714480060.

The previous prime is 20143440173. The next prime is 20143440241. The reversal of 20143440234 is 43204434102.

It is a happy number.

20143440234 is a `hidden beast` number, since 201 + 434 + 4 + 0 + 23 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20143440198 and 20143440207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186513282 + ... + 186513389.

It is an arithmetic number, because the mean of its divisors is an integer number (2797700040).

Almost surely, 2^20143440234 is an apocalyptic number.

20143440234 is an abundant number, since it is smaller than the sum of its proper divisors (24619760406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20143440234 is a wasteful number, since it uses less digits than its factorization.

20143440234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373026682 (or 373026676 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 20143440234 its reverse (43204434102), we get a palindrome (63347874336).

The spelling of 20143440234 in words is "twenty billion, one hundred forty-three million, four hundred forty thousand, two hundred thirty-four".