18029520 has 160 divisors (see below), whose sum is σ = 65888640. Its totient is φ = 4515840.

The previous prime is 18029491. The next prime is 18029521. The reversal of 18029520 is 2592081.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18029521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36475 + ... + 36965.

It is an arithmetic number, because the mean of its divisors is an integer number (411804).

Almost surely, 2^18029520 is an apocalyptic number.

18029520 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 18029520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32944320).

18029520 is an abundant number, since it is smaller than the sum of its proper divisors (47859120).

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

18029520 is a wasteful number, since it uses less digits than its factorization.

18029520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 18029520 is about 4246.1182272754. The cubic root of 18029520 is about 262.2173283690.

The spelling of 18029520 in words is "eighteen million, twenty-nine thousand, five hundred twenty".