181920002 has 8 divisors (see below), whose sum is σ = 297687312. Its totient is φ = 82690900.

The previous prime is 181919999. The next prime is 181920047. The reversal of 181920002 is 200029181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 181920002.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4134524 + ... + 4134567.

It is an arithmetic number, because the mean of its divisors is an integer number (37210914).

Almost surely, 2^181920002 is an apocalyptic number.

181920002 is a deficient number, since it is larger than the sum of its proper divisors (115767310).

181920002 is a wasteful number, since it uses less digits than its factorization.

181920002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8269104.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 181920002 is about 13487.7723142111. The cubic root of 181920002 is about 566.6220670012.

Adding to 181920002 its reverse (200029181), we get a palindrome (381949183).

The spelling of 181920002 in words is "one hundred eighty-one million, nine hundred twenty thousand, two".