18919002 has 16 divisors (see below), whose sum is σ = 37916640. Its totient is φ = 6293232.

The previous prime is 18918983. The next prime is 18919007. The reversal of 18919002 is 20091981.

It is not an unprimeable number, because it can be changed into a prime (18919007) 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 7 ways as a sum of consecutive naturals, for example, 124 + ... + 6152.

It is an arithmetic number, because the mean of its divisors is an integer number (2369790).

Almost surely, 2^18919002 is an apocalyptic number.

18919002 is an abundant number, since it is smaller than the sum of its proper divisors (18997638).

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

18919002 is a wasteful number, since it uses less digits than its factorization.

18919002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6557.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 18919002 is about 4349.5979124512. The cubic root of 18919002 is about 266.4604402088.

It can be divided in two parts, 189 and 19002, that added together give a palindrome (19191).

The spelling of 18919002 in words is "eighteen million, nine hundred nineteen thousand, two".