20319001 has 4 divisors (see below), whose sum is σ = 20336400. Its totient is φ = 20301604.

The previous prime is 20318989. The next prime is 20319007. The reversal of 20319001 is 10091302.

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 20319001 - 2⁷ = 20318873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20319007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6811 + ... + 9328.

It is an arithmetic number, because the mean of its divisors is an integer number (5084100).

Almost surely, 2^20319001 is an apocalyptic number.

It is an amenable number.

20319001 is a deficient number, since it is larger than the sum of its proper divisors (17399).

20319001 is a wasteful number, since it uses less digits than its factorization.

20319001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17398.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 20319001 is about 4507.6602578278. The cubic root of 20319001 is about 272.8773259482.

The spelling of 20319001 in words is "twenty million, three hundred nineteen thousand, one".