18220104 has 48 divisors (see below), whose sum is σ = 56397120. Its totient is φ = 5205600.

The previous prime is 18220099. The next prime is 18220109. The reversal of 18220104 is 40102281.

It is an interprime number because it is at equal distance from previous prime (18220099) and next prime (18220109).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (18220109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17572 + ... + 18579.

It is an arithmetic number, because the mean of its divisors is an integer number (1174940).

Almost surely, 2^18220104 is an apocalyptic number.

18220104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18220104 is an abundant number, since it is smaller than the sum of its proper divisors (38177016).

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

18220104 is a wasteful number, since it uses less digits than its factorization.

18220104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36170 (or 36163 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 18220104 is about 4268.5013763615. The cubic root of 18220104 is about 263.1380289116.

Adding to 18220104 its reverse (40102281), we get a palindrome (58322385).

The spelling of 18220104 in words is "eighteen million, two hundred twenty thousand, one hundred four".