7005721018 has 16 divisors (see below), whose sum is σ = 11198787840. Its totient is φ = 3279272656.

The previous prime is 7005721001. The next prime is 7005721033. The reversal of 7005721018 is 8101275007.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1618033 + ... + 1622356.

It is an arithmetic number, because the mean of its divisors is an integer number (699924240).

Almost surely, 2^7005721018 is an apocalyptic number.

7005721018 is a deficient number, since it is larger than the sum of its proper divisors (4193066822).

7005721018 is a wasteful number, since it uses less digits than its factorization.

7005721018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240461.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 7005721018 is about 83700.1852925070. The cubic root of 7005721018 is about 1913.4521796123.

The spelling of 7005721018 in words is "seven billion, five million, seven hundred twenty-one thousand, eighteen".