20440212143 has 8 divisors (see below), whose sum is σ = 22015711200. Its totient is φ = 18865166688.

The previous prime is 20440212137. The next prime is 20440212209. The reversal of 20440212143 is 34121204402.

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 20440212143 - 2⁸ = 20440211887 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 (20440212743) 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 7 ways as a sum of consecutive naturals, for example, 16748 + ... + 202881.

It is an arithmetic number, because the mean of its divisors is an integer number (2751963900).

Almost surely, 2^20440212143 is an apocalyptic number.

20440212143 is a deficient number, since it is larger than the sum of its proper divisors (1575499057).

20440212143 is a wasteful number, since it uses less digits than its factorization.

20440212143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226801.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20440212143 its reverse (34121204402), we get a palindrome (54561416545).

The spelling of 20440212143 in words is "twenty billion, four hundred forty million, two hundred twelve thousand, one hundred forty-three".