2721663018 has 40 divisors (see below), whose sum is σ = 6419524320. Its totient is φ = 859471560.

The previous prime is 2721662989. The next prime is 2721663053. The reversal of 2721663018 is 8103661272.

2721663018 is a `hidden beast` number, since 2 + 7 + 2 + 1 + 6 + 630 + 18 = 666.

It is a super-3 number, since 3×2721663018³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 439038 + ... + 445193.

It is an arithmetic number, because the mean of its divisors is an integer number (160488108).

Almost surely, 2^2721663018 is an apocalyptic number.

2721663018 is an abundant number, since it is smaller than the sum of its proper divisors (3697861302).

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

2721663018 is a wasteful number, since it uses less digits than its factorization.

2721663018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884264 (or 884255 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 2721663018 is about 52169.5602626666. The cubic root of 2721663018 is about 1396.1908388595.

The spelling of 2721663018 in words is "two billion, seven hundred twenty-one million, six hundred sixty-three thousand, eighteen".