18044753220 has 72 divisors (see below), whose sum is σ = 58946201496. Its totient is φ = 4441784832.

The previous prime is 18044753161. The next prime is 18044753267. The reversal of 18044753220 is 2235744081.

It is a happy number.

18044753220 is a `hidden beast` number, since 1 + 80 + 4 + 47 + 532 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3640432896 + 14404320324 = 60336^2 + 120018^2 .

It is a super-2 number, since 2×18044753220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3853377 + ... + 3858056.

It is an arithmetic number, because the mean of its divisors is an integer number (818697243).

Almost surely, 2^18044753220 is an apocalyptic number.

18044753220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18044753220 is an abundant number, since it is smaller than the sum of its proper divisors (40901448276).

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

18044753220 is a wasteful number, since it uses less digits than its factorization.

18044753220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7711461 (or 7711456 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 18044753220 in words is "eighteen billion, forty-four million, seven hundred fifty-three thousand, two hundred twenty".