1820446194 has 64 divisors (see below), whose sum is σ = 4291854336. Its totient is φ = 503967744.

The previous prime is 1820446153. The next prime is 1820446223. The reversal of 1820446194 is 4916440281.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225394 + ... + 233330.

It is an arithmetic number, because the mean of its divisors is an integer number (67060224).

Almost surely, 2^1820446194 is an apocalyptic number.

1820446194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1820446194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2145927168).

1820446194 is an abundant number, since it is smaller than the sum of its proper divisors (2471408142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1820446194 is a wasteful number, since it uses less digits than its factorization.

1820446194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8119.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 1820446194 is about 42666.6871692659. The cubic root of 1820446194 is about 1221.0289165505.

The spelling of 1820446194 in words is "one billion, eight hundred twenty million, four hundred forty-six thousand, one hundred ninety-four".