18983215336 has 8 divisors (see below), whose sum is σ = 35593528770. Its totient is φ = 9491607664.

The previous prime is 18983215333. The next prime is 18983215337. The reversal of 18983215336 is 63351238981.

It can be written as a sum of positive squares in only one way, i.e., 18832072900 + 151142436 = 137230^2 + 12294^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-4 number, since 4×18983215336⁴ (a number of 42 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18983215336.

It is not an unprimeable number, because it can be changed into a prime (18983215333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1186450951 + ... + 1186450966.

Almost surely, 2^18983215336 is an apocalyptic number.

It is an amenable number.

18983215336 is a deficient number, since it is larger than the sum of its proper divisors (16610313434).

18983215336 is a wasteful number, since it uses less digits than its factorization.

18983215336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372901923 (or 2372901919 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The spelling of 18983215336 in words is "eighteen billion, nine hundred eighty-three million, two hundred fifteen thousand, three hundred thirty-six".