20443001 has 8 divisors (see below), whose sum is σ = 20905344. Its totient is φ = 19983600.

The previous prime is 20442997. The next prime is 20443009. The reversal of 20443001 is 10034402.

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 20443001 - 2² = 20442997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443009) 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, 18926 + ... + 19976.

It is an arithmetic number, because the mean of its divisors is an integer number (2613168).

Almost surely, 2^20443001 is an apocalyptic number.

It is an amenable number.

20443001 is a deficient number, since it is larger than the sum of its proper divisors (462343).

20443001 is a wasteful number, since it uses less digits than its factorization.

20443001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20443001 is about 4521.3937010617. The cubic root of 20443001 is about 273.4312932969.

Adding to 20443001 its reverse (10034402), we get a palindrome (30477403).

The spelling of 20443001 in words is "twenty million, four hundred forty-three thousand, one".