20430043001 has 4 divisors (see below), whose sum is σ = 20490666612. Its totient is φ = 20369419392.

The previous prime is 20430042979. The next prime is 20430043021. The reversal of 20430043001 is 10034003402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7593379600 + 12836663401 = 87140^2 + 113299^2 .

It is a cyclic number.

It is not a de Polignac number, because 20430043001 - 2¹⁰ = 20430041977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430043021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30311300 + ... + 30311973.

It is an arithmetic number, because the mean of its divisors is an integer number (5122666653).

Almost surely, 2^20430043001 is an apocalyptic number.

It is an amenable number.

20430043001 is a deficient number, since it is larger than the sum of its proper divisors (60623611).

20430043001 is an equidigital number, since it uses as much as digits as its factorization.

20430043001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60623610.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20430043001 its reverse (10034003402), we get a palindrome (30464046403).

The spelling of 20430043001 in words is "twenty billion, four hundred thirty million, forty-three thousand, one".