18451312736 has 24 divisors (see below), whose sum is σ = 37307808720. Its totient is φ = 8976313728.

The previous prime is 18451312721. The next prime is 18451312739. The reversal of 18451312736 is 63721315481.

It is a junction number, because it is equal to n+sod(n) for n = 18451312693 and 18451312702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18451312739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7790756 + ... + 7793123.

It is an arithmetic number, because the mean of its divisors is an integer number (1554492030).

Almost surely, 2^18451312736 is an apocalyptic number.

18451312736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18451312736 is an abundant number, since it is smaller than the sum of its proper divisors (18856495984).

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

18451312736 is a wasteful number, since it uses less digits than its factorization.

18451312736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15583926 (or 15583918 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The spelling of 18451312736 in words is "eighteen billion, four hundred fifty-one million, three hundred twelve thousand, seven hundred thirty-six".