20443332401 has 8 divisors (see below), whose sum is σ = 20552699904. Its totient is φ = 20334257280.

The previous prime is 20443332379. The next prime is 20443332449. The reversal of 20443332401 is 10423334402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20443332401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20443332461) 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, 67841 + ... + 213281.

It is an arithmetic number, because the mean of its divisors is an integer number (2569087488).

Almost surely, 2^20443332401 is an apocalyptic number.

It is an amenable number.

20443332401 is a deficient number, since it is larger than the sum of its proper divisors (109367503).

20443332401 is a wasteful number, since it uses less digits than its factorization.

20443332401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146191.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 20443332401 its reverse (10423334402), we get a palindrome (30866666803).

The spelling of 20443332401 in words is "twenty billion, four hundred forty-three million, three hundred thirty-two thousand, four hundred one".