18920010 has 48 divisors (see below), whose sum is σ = 47951136. Its totient is φ = 4777056.

The previous prime is 18920003. The next prime is 18920047. The reversal of 18920010 is 1002981.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9957 + ... + 11703.

It is an arithmetic number, because the mean of its divisors is an integer number (998982).

Almost surely, 2^18920010 is an apocalyptic number.

18920010 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 18920010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23975568).

18920010 is an abundant number, since it is smaller than the sum of its proper divisors (29031126).

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

18920010 is a wasteful number, since it uses less digits than its factorization.

18920010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795 (or 1776 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 18920010 is about 4349.7137836874. The cubic root of 18920010 is about 266.4651724414.

Adding to 18920010 its reverse (1002981), we get a palindrome (19922991).

The spelling of 18920010 in words is "eighteen million, nine hundred twenty thousand, ten".