20017085323 has 4 divisors (see below), whose sum is σ = 20017376640. Its totient is φ = 20016794008.

The previous prime is 20017085317. The next prime is 20017085339. The reversal of 20017085323 is 32358071002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20017085323 - 2⁹ = 20017084811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20017080323) 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, 20886 + ... + 201172.

It is an arithmetic number, because the mean of its divisors is an integer number (5004344160).

Almost surely, 2^20017085323 is an apocalyptic number.

20017085323 is a deficient number, since it is larger than the sum of its proper divisors (291317).

20017085323 is a wasteful number, since it uses less digits than its factorization.

20017085323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291316.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 20017085323 in words is "twenty billion, seventeen million, eighty-five thousand, three hundred twenty-three".