18747447330 has 32 divisors (see below), whose sum is σ = 45011505600. Its totient is φ = 4997360192.

The previous prime is 18747447293. The next prime is 18747447337. The reversal of 18747447330 is 3374474781.

It is a super-2 number, since 2×18747447330² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18747447330.

It is not an unprimeable number, because it can be changed into a prime (18747447337) 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 in 15 ways as a sum of consecutive naturals, for example, 43785 + ... + 198524.

It is an arithmetic number, because the mean of its divisors is an integer number (1406609550).

Almost surely, 2^18747447330 is an apocalyptic number.

18747447330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18747447330 is an abundant number, since it is smaller than the sum of its proper divisors (26264058270).

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

18747447330 is a wasteful number, since it uses less digits than its factorization.

18747447330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244898.

The product of its (nonzero) digits is 1580544, while the sum is 48.

The spelling of 18747447330 in words is "eighteen billion, seven hundred forty-seven million, four hundred forty-seven thousand, three hundred thirty".