18020081124 has 192 divisors, whose sum is σ = 51797491200. Its totient is φ = 5388742656.

The previous prime is 18020081083. The next prime is 18020081129. The reversal of 18020081124 is 42118002081.

It is a super-2 number, since 2×18020081124² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18020081129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16426144 + ... + 16427240.

It is an arithmetic number, because the mean of its divisors is an integer number (269778600).

Almost surely, 2^18020081124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18020081124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25898745600).

18020081124 is an abundant number, since it is smaller than the sum of its proper divisors (33777410076).

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

18020081124 is a wasteful number, since it uses less digits than its factorization.

18020081124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539 (or 1531 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The spelling of 18020081124 in words is "eighteen billion, twenty million, eighty-one thousand, one hundred twenty-four".