90369212018 has 4 divisors (see below), whose sum is σ = 135553818030. Its totient is φ = 45184606008.

The previous prime is 90369212009. The next prime is 90369212039. The reversal of 90369212018 is 81021296309.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81021296309 = 557 ⋅145460137.

It can be written as a sum of positive squares in only one way, i.e., 75507895369 + 14861316649 = 274787^2 + 121907^2 .

It is an unprimeable number.

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, 22592303003 + ... + 22592303006.

Almost surely, 2^90369212018 is an apocalyptic number.

90369212018 is a deficient number, since it is larger than the sum of its proper divisors (45184606012).

90369212018 is a wasteful number, since it uses less digits than its factorization.

90369212018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45184606011.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 90369212018 in words is "ninety billion, three hundred sixty-nine million, two hundred twelve thousand, eighteen".