18020001002 has 4 divisors (see below), whose sum is σ = 27030001506. Its totient is φ = 9010000500.

The previous prime is 18020000989. The next prime is 18020001091. The reversal of 18020001002 is 20010002081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20010002081 = 61 ⋅328032821.

It can be written as a sum of positive squares in only one way, i.e., 12535265521 + 5484735481 = 111961^2 + 74059^2 .

It is a super-2 number, since 2×18020001002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4505000249 + ... + 4505000252.

Almost surely, 2^18020001002 is an apocalyptic number.

18020001002 is a deficient number, since it is larger than the sum of its proper divisors (9010000504).

18020001002 is an equidigital number, since it uses as much as digits as its factorization.

18020001002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9010000503.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 18020001002 its reverse (20010002081), we get a palindrome (38030003083).

The spelling of 18020001002 in words is "eighteen billion, twenty million, one thousand, two".