1796021818 has 4 divisors (see below), whose sum is σ = 2694032730. Its totient is φ = 898010908.

The previous prime is 1796021803. The next prime is 1796021819. The reversal of 1796021818 is 8181206971.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8181206971 = 7 ⋅1168743853.

It can be written as a sum of positive squares in only one way, i.e., 963295369 + 832726449 = 31037^2 + 28857^2 .

It is not an unprimeable number, because it can be changed into a prime (1796021819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449005453 + ... + 449005456.

Almost surely, 2^1796021818 is an apocalyptic number.

1796021818 is a deficient number, since it is larger than the sum of its proper divisors (898010912).

1796021818 is an equidigital number, since it uses as much as digits as its factorization.

1796021818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898010911.

The product of its (nonzero) digits is 48384, while the sum is 43.

The square root of 1796021818 is about 42379.4976138227. The cubic root of 1796021818 is about 1215.5435860147.

The spelling of 1796021818 in words is "one billion, seven hundred ninety-six million, twenty-one thousand, eight hundred eighteen".