18220050 has 72 divisors (see below), whose sum is σ = 51551760. Its totient is φ = 4600800.

The previous prime is 18220049. The next prime is 18220051. The reversal of 18220050 is 5002281.

It is an interprime number because it is at equal distance from previous prime (18220049) and next prime (18220051).

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 (18220051) 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 35 ways as a sum of consecutive naturals, for example, 7485 + ... + 9615.

Almost surely, 2^18220050 is an apocalyptic number.

18220050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18220050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25775880).

18220050 is an abundant number, since it is smaller than the sum of its proper divisors (33331710).

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

18220050 is a wasteful number, since it uses less digits than its factorization.

18220050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168 (or 2160 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 18220050 is about 4268.4950509518. The cubic root of 18220050 is about 263.1377689521.

The spelling of 18220050 in words is "eighteen million, two hundred twenty thousand, fifty".