18712512 has 336 divisors, whose sum is σ = 72969120. Its totient is φ = 4644864.

The previous prime is 18712489. The next prime is 18712513. The reversal of 18712512 is 21521781.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18712513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1100728 + ... + 1100744.

It is an arithmetic number, because the mean of its divisors is an integer number (217170).

Almost surely, 2^18712512 is an apocalyptic number.

18712512 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 18712512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36484560).

18712512 is an abundant number, since it is smaller than the sum of its proper divisors (54256608).

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

18712512 is a wasteful number, since it uses less digits than its factorization.

18712512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 42 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 18712512 is about 4325.7961117001. The cubic root of 18712512 is about 265.4874710804.

The spelling of 18712512 in words is "eighteen million, seven hundred twelve thousand, five hundred twelve".