20017005745 has 8 divisors (see below), whose sum is σ = 26204080320. Its totient is φ = 14557822320.

The previous prime is 20017005739. The next prime is 20017005751. The reversal of 20017005745 is 54750071002.

It is an interprime number because it is at equal distance from previous prime (20017005739) and next prime (20017005751).

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

It is not a de Polignac number, because 20017005745 - 2³ = 20017005737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181972725 + ... + 181972834.

It is an arithmetic number, because the mean of its divisors is an integer number (3275510040).

Almost surely, 2^20017005745 is an apocalyptic number.

It is an amenable number.

20017005745 is a deficient number, since it is larger than the sum of its proper divisors (6187074575).

20017005745 is a wasteful number, since it uses less digits than its factorization.

20017005745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363945575.

The product of its (nonzero) digits is 9800, while the sum is 31.

Adding to 20017005745 its reverse (54750071002), we get a palindrome (74767076747).

The spelling of 20017005745 in words is "twenty billion, seventeen million, five thousand, seven hundred forty-five".