20402143203 has 16 divisors (see below), whose sum is σ = 29312138240. Its totient is φ = 12547985184.

The previous prime is 20402143199. The next prime is 20402143213. The reversal of 20402143203 is 30234120402.

It is not a de Polignac number, because 20402143203 - 2² = 20402143199 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 20402143203.

It is not an unprimeable number, because it can be changed into a prime (20402143213) 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, 80101 + ... + 217302.

It is an arithmetic number, because the mean of its divisors is an integer number (1832008640).

Almost surely, 2^20402143203 is an apocalyptic number.

20402143203 is a deficient number, since it is larger than the sum of its proper divisors (8909995037).

20402143203 is a wasteful number, since it uses less digits than its factorization.

20402143203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299178.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20402143203 its reverse (30234120402), we get a palindrome (50636263605).

The spelling of 20402143203 in words is "twenty billion, four hundred two million, one hundred forty-three thousand, two hundred three".