84903906218 has 4 divisors (see below), whose sum is σ = 127355859330. Its totient is φ = 42451953108.

The previous prime is 84903906211. The next prime is 84903906223. The reversal of 84903906218 is 81260930948.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 84113340529 + 790565689 = 290023^2 + 28117^2 .

It is not an unprimeable number, because it can be changed into a prime (84903906211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21225976553 + ... + 21225976556.

Almost surely, 2^84903906218 is an apocalyptic number.

84903906218 is a deficient number, since it is larger than the sum of its proper divisors (42451953112).

84903906218 is a wasteful number, since it uses less digits than its factorization.

84903906218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42451953111.

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 84903906218 in words is "eighty-four billion, nine hundred three million, nine hundred six thousand, two hundred eighteen".