18198467432 has 8 divisors (see below), whose sum is σ = 34122126450. Its totient is φ = 9099233712.

The previous prime is 18198467431. The next prime is 18198467449. The reversal of 18198467432 is 23476489181.

It can be written as a sum of positive squares in only one way, i.e., 12999192196 + 5199275236 = 114014^2 + 72106^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18198467431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1137404207 + ... + 1137404222.

Almost surely, 2^18198467432 is an apocalyptic number.

It is an amenable number.

18198467432 is a deficient number, since it is larger than the sum of its proper divisors (15923659018).

18198467432 is a wasteful number, since it uses less digits than its factorization.

18198467432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274808435 (or 2274808431 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 53.

The spelling of 18198467432 in words is "eighteen billion, one hundred ninety-eight million, four hundred sixty-seven thousand, four hundred thirty-two".