18037444279680 has 1792 divisors, whose sum is σ = 76809109155840. Its totient is φ = 3961743851520.

The previous prime is 18037444279663. The next prime is 18037444279681. The reversal of 18037444279680 is 8697244473081.

18037444279680 is a `hidden beast` number, since 1 + 8 + 0 + 3 + 7 + 44 + 427 + 96 + 80 = 666.

It is a super-2 number, since 2×18037444279680² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18037444279681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 16502693214 + ... + 16502694306.

Almost surely, 2^{18037444279680} is an apocalyptic number.

18037444279680 is a gapful number since it is divisible by the number (10) 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 18037444279680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38404554577920).

18037444279680 is an abundant number, since it is smaller than the sum of its proper divisors (58771664876160).

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

18037444279680 is a wasteful number, since it uses less digits than its factorization.

18037444279680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331 (or 1304 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 63.

The spelling of 18037444279680 in words is "eighteen trillion, thirty-seven billion, four hundred forty-four million, two hundred seventy-nine thousand, six hundred eighty".