18236973474 has 16 divisors (see below), whose sum is σ = 40526607840. Its totient is φ = 6078991140.

The previous prime is 18236973473. The next prime is 18236973479. The reversal of 18236973474 is 47437963281.

18236973474 is a `hidden beast` number, since 1 + 82 + 3 + 6 + 97 + 3 + 474 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 337721731 = 18236973474 / (1 + 8 + 2 + 3 + 6 + 9 + 7 + 3 + 4 + 7 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 18236973474.

It is not an unprimeable number, because it can be changed into a prime (18236973473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168860812 + ... + 168860919.

It is an arithmetic number, because the mean of its divisors is an integer number (2532912990).

Almost surely, 2^18236973474 is an apocalyptic number.

18236973474 is an abundant number, since it is smaller than the sum of its proper divisors (22289634366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18236973474 is a wasteful number, since it uses less digits than its factorization.

18236973474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337721742 (or 337721736 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The spelling of 18236973474 in words is "eighteen billion, two hundred thirty-six million, nine hundred seventy-three thousand, four hundred seventy-four".