18844149072 has 160 divisors (see below), whose sum is σ = 57340329984. Its totient is φ = 5220633600.

The previous prime is 18844149059. The next prime is 18844149083. The reversal of 18844149072 is 27094144881.

It is a super-2 number, since 2×18844149072² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2296497 + ... + 2304687.

Almost surely, 2^18844149072 is an apocalyptic number.

18844149072 is a gapful number since it is divisible by the number (12) 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 18844149072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28670164992).

18844149072 is an abundant number, since it is smaller than the sum of its proper divisors (38496180912).

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

18844149072 is a wasteful number, since it uses less digits than its factorization.

18844149072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8417 (or 8411 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 18844149072 in words is "eighteen billion, eight hundred forty-four million, one hundred forty-nine thousand, seventy-two".