20461032143 has 4 divisors (see below), whose sum is σ = 20563851600. Its totient is φ = 20358212688.

The previous prime is 20461032131. The next prime is 20461032181. The reversal of 20461032143 is 34123016402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20461032143 - 2²² = 20456837839 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 (20461032343) 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 3 ways as a sum of consecutive naturals, for example, 51409430 + ... + 51409827.

It is an arithmetic number, because the mean of its divisors is an integer number (5140962900).

Almost surely, 2^20461032143 is an apocalyptic number.

20461032143 is a deficient number, since it is larger than the sum of its proper divisors (102819457).

20461032143 is a wasteful number, since it uses less digits than its factorization.

20461032143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102819456.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 20461032143 its reverse (34123016402), we get a palindrome (54584048545).

The spelling of 20461032143 in words is "twenty billion, four hundred sixty-one million, thirty-two thousand, one hundred forty-three".