1918211201 has 12 divisors (see below), whose sum is σ = 2126286912. Its totient is φ = 1726874688.

The previous prime is 1918211179. The next prime is 1918211203. The reversal of 1918211201 is 1021128191.

It is a de Polignac number, because none of the positive numbers 2^k-1918211201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1918211203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137645 + ... + 150938.

It is an arithmetic number, because the mean of its divisors is an integer number (177190576).

Almost surely, 2^1918211201 is an apocalyptic number.

It is an amenable number.

1918211201 is a deficient number, since it is larger than the sum of its proper divisors (208075711).

1918211201 is a wasteful number, since it uses less digits than its factorization.

1918211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288640 (or 288623 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 26.

The square root of 1918211201 is about 43797.3880613901. The cubic root of 1918211201 is about 1242.5068953380.

Adding to 1918211201 its reverse (1021128191), we get a palindrome (2939339392).

The spelling of 1918211201 in words is "one billion, nine hundred eighteen million, two hundred eleven thousand, two hundred one".