8180020001 has 4 divisors (see below), whose sum is σ = 8207938452. Its totient is φ = 8152101552.

The previous prime is 8180019983. The next prime is 8180020021. The reversal of 8180020001 is 1000200818.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5347119376 + 2832900625 = 73124^2 + 53225^2 .

It is a cyclic number.

It is not a de Polignac number, because 8180020001 - 2¹⁸ = 8179757857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8180020021) 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, 13958786 + ... + 13959371.

It is an arithmetic number, because the mean of its divisors is an integer number (2051984613).

Almost surely, 2^8180020001 is an apocalyptic number.

It is an amenable number.

8180020001 is a deficient number, since it is larger than the sum of its proper divisors (27918451).

8180020001 is a wasteful number, since it uses less digits than its factorization.

8180020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27918450.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 8180020001 is about 90443.4630086664. The cubic root of 8180020001 is about 2014.8905277053.

Adding to 8180020001 its reverse (1000200818), we get a palindrome (9180220819).

The spelling of 8180020001 in words is "eight billion, one hundred eighty million, twenty thousand, one".