1820100002001 has 16 divisors (see below), whose sum is σ = 2437147637760. Its totient is φ = 1208230428240.

The previous prime is 1820100001997. The next prime is 1820100002009. The reversal of 1820100002001 is 1002000010281.

It is not a de Polignac number, because 1820100002001 - 2² = 1820100001997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1820100002009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1189896 + ... + 2248566.

It is an arithmetic number, because the mean of its divisors is an integer number (152321727360).

Almost surely, 2^{1820100002001} is an apocalyptic number.

It is an amenable number.

1820100002001 is a deficient number, since it is larger than the sum of its proper divisors (617047635759).

1820100002001 is a wasteful number, since it uses less digits than its factorization.

1820100002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061116.

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

Adding to 1820100002001 its reverse (1002000010281), we get a palindrome (2822100012282).

The spelling of 1820100002001 in words is "one trillion, eight hundred twenty billion, one hundred million, two thousand, one".