18234020 has 48 divisors (see below), whose sum is σ = 44123520. Its totient is φ = 6200064.

The previous prime is 18234017. The next prime is 18234023. The reversal of 18234020 is 2043281.

It is an interprime number because it is at equal distance from previous prime (18234017) and next prime (18234023).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 18233983 and 18234001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18234023) 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 15 ways as a sum of consecutive naturals, for example, 18992 + ... + 19928.

It is an arithmetic number, because the mean of its divisors is an integer number (919240).

Almost surely, 2^18234020 is an apocalyptic number.

18234020 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 18234020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22061760).

18234020 is an abundant number, since it is smaller than the sum of its proper divisors (25889500).

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

18234020 is a wasteful number, since it uses less digits than its factorization.

18234020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092 (or 1090 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 18234020 is about 4270.1311455270. The cubic root of 18234020 is about 263.2050043240.

The spelling of 18234020 in words is "eighteen million, two hundred thirty-four thousand, twenty".