18033222472 has 32 divisors (see below), whose sum is σ = 34142743800. Its totient is φ = 8928589824.

The previous prime is 18033222461. The next prime is 18033222509. The reversal of 18033222472 is 27422233081.

It can be written as a sum of positive squares in 4 ways, for example, as 16273084356 + 1760138116 = 127566^2 + 41954^2 .

It is a super-2 number, since 2×18033222472² (a number of 21 digits) contains 22 as substring.

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, 1753698 + ... + 1763950.

Almost surely, 2^18033222472 is an apocalyptic number.

It is an amenable number.

18033222472 is a deficient number, since it is larger than the sum of its proper divisors (16109521328).

18033222472 is a wasteful number, since it uses less digits than its factorization.

18033222472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12385 (or 12381 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The spelling of 18033222472 in words is "eighteen billion, thirty-three million, two hundred twenty-two thousand, four hundred seventy-two".