1820018401 has 8 divisors (see below), whose sum is σ = 1879953408. Its totient is φ = 1760160000.

The previous prime is 1820018383. The next prime is 1820018429. The reversal of 1820018401 is 1048100281.

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

It is a cyclic number.

It is not a de Polignac number, because 1820018401 - 2¹⁵ = 1819985633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1820018441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31296 + ... + 67966.

It is an arithmetic number, because the mean of its divisors is an integer number (234994176).

Almost surely, 2^1820018401 is an apocalyptic number.

It is an amenable number.

1820018401 is a deficient number, since it is larger than the sum of its proper divisors (59935007).

1820018401 is a wasteful number, since it uses less digits than its factorization.

1820018401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38303.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 1820018401 is about 42661.6736779044. The cubic root of 1820018401 is about 1220.9332644431.

Adding to 1820018401 its reverse (1048100281), we get a palindrome (2868118682).

The spelling of 1820018401 in words is "one billion, eight hundred twenty million, eighteen thousand, four hundred one".