18711232510012 has 48 divisors (see below), whose sum is σ = 38191221169920. Its totient is φ = 7855326738432.

The previous prime is 18711232510001. The next prime is 18711232510013. The reversal of 18711232510012 is 21001523211781.

It is a super-2 number, since 2×18711232510012² (a number of 27 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 18711232510012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18711232510013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19543813 + ... + 20478844.

It is an arithmetic number, because the mean of its divisors is an integer number (795650441040).

Almost surely, 2^{18711232510012} is an apocalyptic number.

It is an amenable number.

18711232510012 is an abundant number, since it is smaller than the sum of its proper divisors (19479988659908).

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

18711232510012 is a wasteful number, since it uses less digits than its factorization.

18711232510012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40023010 (or 40023008 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 34.

Adding to 18711232510012 its reverse (21001523211781), we get a palindrome (39712755721793).

The spelling of 18711232510012 in words is "eighteen trillion, seven hundred eleven billion, two hundred thirty-two million, five hundred ten thousand, twelve".