1812898201 has 4 divisors (see below), whose sum is σ = 1834740432. Its totient is φ = 1791055972.

The previous prime is 1812898193. The next prime is 1812898237. The reversal of 1812898201 is 1028982181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1812898201 - 2³ = 1812898193 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1812898001) 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, 10920991 + ... + 10921156.

It is an arithmetic number, because the mean of its divisors is an integer number (458685108).

Almost surely, 2^1812898201 is an apocalyptic number.

It is an amenable number.

1812898201 is a deficient number, since it is larger than the sum of its proper divisors (21842231).

1812898201 is an equidigital number, since it uses as much as digits as its factorization.

1812898201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21842230.

The product of its (nonzero) digits is 18432, while the sum is 40.

The square root of 1812898201 is about 42578.1422915561. The cubic root of 1812898201 is about 1219.3390222758.

The spelling of 1812898201 in words is "one billion, eight hundred twelve million, eight hundred ninety-eight thousand, two hundred one".