18634433157312 has 112 divisors (see below), whose sum is σ = 57869867861760. Its totient is φ = 5180228508672.

The previous prime is 18634433157281. The next prime is 18634433157367. The reversal of 18634433157312 is 21375133443681.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187313862 + ... + 187413317.

Almost surely, 2^{18634433157312} is an apocalyptic number.

18634433157312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18634433157312 is an abundant number, since it is smaller than the sum of its proper divisors (39235434704448).

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

18634433157312 is a wasteful number, since it uses less digits than its factorization.

18634433157312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374727238 (or 374727228 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 51.

The spelling of 18634433157312 in words is "eighteen trillion, six hundred thirty-four billion, four hundred thirty-three million, one hundred fifty-seven thousand, three hundred twelve".