1820100201 has 8 divisors (see below), whose sum is σ = 2427679104. Its totient is φ = 1212960720.

The previous prime is 1820100181. The next prime is 1820100221. The reversal of 1820100201 is 1020010281.

It is an interprime number because it is at equal distance from previous prime (1820100181) and next prime (1820100221).

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

It is not a de Polignac number, because 1820100201 - 2⁵ = 1820100169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1820100221) 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, 100065 + ... + 116846.

It is an arithmetic number, because the mean of its divisors is an integer number (303459888).

Almost surely, 2^1820100201 is an apocalyptic number.

It is an amenable number.

1820100201 is a deficient number, since it is larger than the sum of its proper divisors (607578903).

1820100201 is a wasteful number, since it uses less digits than its factorization.

1820100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219711.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1820100201 is about 42662.6323730733. The cubic root of 1820100201 is about 1220.9515556216.

Adding to 1820100201 its reverse (1020010281), we get a palindrome (2840110482).

The spelling of 1820100201 in words is "one billion, eight hundred twenty million, one hundred thousand, two hundred one".