17987442002 has 4 divisors (see below), whose sum is σ = 26981163006. Its totient is φ = 8993721000.

The previous prime is 17987442001. The next prime is 17987442013. The reversal of 17987442002 is 20024478971.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11457347521 + 6530094481 = 107039^2 + 80809^2 .

It is not an unprimeable number, because it can be changed into a prime (17987442001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4496860499 + ... + 4496860502.

Almost surely, 2^17987442002 is an apocalyptic number.

17987442002 is a deficient number, since it is larger than the sum of its proper divisors (8993721004).

17987442002 is an equidigital number, since it uses as much as digits as its factorization.

17987442002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8993721003.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 17987442002 in words is "seventeen billion, nine hundred eighty-seven million, four hundred forty-two thousand, two".