18069820 has 24 divisors (see below), whose sum is σ = 38664864. Its totient is φ = 7091136.

The previous prime is 18069791. The next prime is 18069823. The reversal of 18069820 is 2896081.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18069823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7464 + ... + 9583.

It is an arithmetic number, because the mean of its divisors is an integer number (1611036).

Almost surely, 2^18069820 is an apocalyptic number.

18069820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18069820 is an abundant number, since it is smaller than the sum of its proper divisors (20595044).

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

18069820 is a wasteful number, since it uses less digits than its factorization.

18069820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17109 (or 17107 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18069820 is about 4250.8610892383. The cubic root of 18069820 is about 262.4125543951.

The spelling of 18069820 in words is "eighteen million, sixty-nine thousand, eight hundred twenty".