20430143443 has 8 divisors (see below), whose sum is σ = 20991749328. Its totient is φ = 19869034464.

The previous prime is 20430143381. The next prime is 20430143449. The reversal of 20430143443 is 34434103402.

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 20430143443 - 2²¹ = 20428046291 is a prime.

It is a super-2 number, since 2×20430143443² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430143449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40096 + ... + 206077.

It is an arithmetic number, because the mean of its divisors is an integer number (2623968666).

Almost surely, 2^20430143443 is an apocalyptic number.

20430143443 is a deficient number, since it is larger than the sum of its proper divisors (561605885).

20430143443 is a wasteful number, since it uses less digits than its factorization.

20430143443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248453.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 20430143443 its reverse (34434103402), we get a palindrome (54864246845).

The spelling of 20430143443 in words is "twenty billion, four hundred thirty million, one hundred forty-three thousand, four hundred forty-three".