18631154326212 has 18 divisors (see below), whose sum is σ = 47095417880238. Its totient is φ = 6210384775392.

The previous prime is 18631154326201. The next prime is 18631154326243. The reversal of 18631154326212 is 21262345113681.

18631154326212 is a `hidden beast` number, since 1 + 8 + 6 + 3 + 1 + 15 + 4 + 3 + 2 + 621 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16783229466756 + 1847924859456 = 4096734^2 + 1359384^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258766032273 + ... + 258766032344.

Almost surely, 2^{18631154326212} is an apocalyptic number.

18631154326212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18631154326212 is an abundant number, since it is smaller than the sum of its proper divisors (28464263554026).

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

18631154326212 is a wasteful number, since it uses less digits than its factorization.

18631154326212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517532064627 (or 517532064622 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

Adding to 18631154326212 its reverse (21262345113681), we get a palindrome (39893499439893).

The spelling of 18631154326212 in words is "eighteen trillion, six hundred thirty-one billion, one hundred fifty-four million, three hundred twenty-six thousand, two hundred twelve".