18437184012 has 96 divisors (see below), whose sum is σ = 49329907200. Its totient is φ = 5309309952.

The previous prime is 18437184011. The next prime is 18437184023. The reversal of 18437184012 is 21048173481.

It is a super-2 number, since 2×18437184012² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (18437184011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 455289 + ... + 494127.

It is an arithmetic number, because the mean of its divisors is an integer number (513853200).

Almost surely, 2^18437184012 is an apocalyptic number.

18437184012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18437184012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24664953600).

18437184012 is an abundant number, since it is smaller than the sum of its proper divisors (30892723188).

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

18437184012 is a wasteful number, since it uses less digits than its factorization.

18437184012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39055 (or 39053 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The spelling of 18437184012 in words is "eighteen billion, four hundred thirty-seven million, one hundred eighty-four thousand, twelve".