1918198246 has 4 divisors (see below), whose sum is σ = 2877297372. Its totient is φ = 959099122.

The previous prime is 1918198237. The next prime is 1918198283. The reversal of 1918198246 is 6428918191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6428918191 = 10267 ⋅626173.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1918198246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 479549560 + ... + 479549563.

It is an arithmetic number, because the mean of its divisors is an integer number (719324343).

Almost surely, 2^1918198246 is an apocalyptic number.

1918198246 is a deficient number, since it is larger than the sum of its proper divisors (959099126).

1918198246 is an equidigital number, since it uses as much as digits as its factorization.

1918198246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959099125.

The product of its digits is 248832, while the sum is 49.

The square root of 1918198246 is about 43797.2401641930. The cubic root of 1918198246 is about 1242.5040981637.

The spelling of 1918198246 in words is "one billion, nine hundred eighteen million, one hundred ninety-eight thousand, two hundred forty-six".