8521379018 has 16 divisors (see below), whose sum is σ = 13000980384. Its totient is φ = 4187819760.

The previous prime is 8521378981. The next prime is 8521379029. The reversal of 8521379018 is 8109731258.

It is a super-2 number, since 2×8521379018² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8521379018.

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, 149621 + ... + 198567.

It is an arithmetic number, because the mean of its divisors is an integer number (812561274).

Almost surely, 2^8521379018 is an apocalyptic number.

8521379018 is a deficient number, since it is larger than the sum of its proper divisors (4479601366).

8521379018 is a wasteful number, since it uses less digits than its factorization.

8521379018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50437.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 8521379018 is about 92311.3157635617. The cubic root of 8521379018 is about 2042.5371337096.

The spelling of 8521379018 in words is "eight billion, five hundred twenty-one million, three hundred seventy-nine thousand, eighteen".