2204081618 has 18 divisors (see below), whose sum is σ = 3352675599. Its totient is φ = 1086736992.

The previous prime is 2204081563. The next prime is 2204081629. The reversal of 2204081618 is 8161804022.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 501446449 + 1702635169 = 22393^2 + 41263^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=33197.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5908880 + ... + 5909252.

Almost surely, 2^2204081618 is an apocalyptic number.

2204081618 is a deficient number, since it is larger than the sum of its proper divisors (1148593981).

2204081618 is an frugal number, since it uses more digits than its factorization.

2204081618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 2204081618 is about 46947.6476300996. The cubic root of 2204081618 is about 1301.3952707770.

Multiplying 2204081618 by its sum of digits (32), we get a square (70530611776 = 265576²).

The spelling of 2204081618 in words is "two billion, two hundred four million, eighty-one thousand, six hundred eighteen".