18920002 has 16 divisors (see below), whose sum is σ = 29145600. Its totient is φ = 9208080.

The previous prime is 18919981. The next prime is 18920003. The reversal of 18920002 is 20002981.

It is not an unprimeable number, because it can be changed into a prime (18920003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12127 + ... + 13597.

It is an arithmetic number, because the mean of its divisors is an integer number (1821600).

Almost surely, 2^18920002 is an apocalyptic number.

18920002 is a deficient number, since it is larger than the sum of its proper divisors (10225598).

18920002 is a wasteful number, since it uses less digits than its factorization.

18920002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 18920002 is about 4349.7128640865. The cubic root of 18920002 is about 266.4651348847.

Adding to 18920002 its reverse (20002981), we get a palindrome (38922983).

The spelling of 18920002 in words is "eighteen million, nine hundred twenty thousand, two".