1220002018 has 24 divisors (see below), whose sum is σ = 1949212188. Its totient is φ = 572443872.

The previous prime is 1220001973. The next prime is 1220002019. The reversal of 1220002018 is 8102000221.

It can be written as a sum of positive squares in 2 ways, for example, as 1065173769 + 154828249 = 32637^2 + 12443^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220001992 and 1220002010.

It is not an unprimeable number, because it can be changed into a prime (1220002019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45196 + ... + 66952.

Almost surely, 2^1220002018 is an apocalyptic number.

1220002018 is a deficient number, since it is larger than the sum of its proper divisors (729210170).

1220002018 is a wasteful number, since it uses less digits than its factorization.

1220002018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21858 (or 21835 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1220002018 is about 34928.5272807200. The cubic root of 1220002018 is about 1068.5303192996.

Adding to 1220002018 its reverse (8102000221), we get a palindrome (9322002239).

The spelling of 1220002018 in words is "one billion, two hundred twenty million, two thousand, eighteen".