20443161001 has 4 divisors (see below), whose sum is σ = 21331994112. Its totient is φ = 19554327892.

The previous prime is 20443160999. The next prime is 20443161029. The reversal of 20443161001 is 10016134402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20443161001 - 2¹ = 20443160999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443161041) 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, 444416521 + ... + 444416566.

It is an arithmetic number, because the mean of its divisors is an integer number (5332998528).

Almost surely, 2^20443161001 is an apocalyptic number.

It is an amenable number.

20443161001 is a deficient number, since it is larger than the sum of its proper divisors (888833111).

20443161001 is an equidigital number, since it uses as much as digits as its factorization.

20443161001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888833110.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 20443161001 its reverse (10016134402), we get a palindrome (30459295403).

The spelling of 20443161001 in words is "twenty billion, four hundred forty-three million, one hundred sixty-one thousand, one".