9181820002 has 24 divisors (see below), whose sum is σ = 14268448512. Its totient is φ = 4426795800.

The previous prime is 9181819993. The next prime is 9181820017. The reversal of 9181820002 is 2000281819.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8905227 + ... + 8906257.

It is an arithmetic number, because the mean of its divisors is an integer number (594518688).

Almost surely, 2^9181820002 is an apocalyptic number.

9181820002 is a deficient number, since it is larger than the sum of its proper divisors (5086628510).

9181820002 is a wasteful number, since it uses less digits than its factorization.

9181820002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822 (or 1443 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 9181820002 is about 95821.8138108437. The cubic root of 9181820002 is about 2093.9979792459.

The spelling of 9181820002 in words is "nine billion, one hundred eighty-one million, eight hundred twenty thousand, two".