19917002002 has 8 divisors (see below), whose sum is σ = 29876979456. Its totient is φ = 9958008852.

The previous prime is 19917001981. The next prime is 19917002011. The reversal of 19917002002 is 20020071991.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193218 + ... + 277789.

It is an arithmetic number, because the mean of its divisors is an integer number (3734622432).

Almost surely, 2^19917002002 is an apocalyptic number.

19917002002 is a deficient number, since it is larger than the sum of its proper divisors (9959977454).

19917002002 is a wasteful number, since it uses less digits than its factorization.

19917002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492152.

The product of its (nonzero) digits is 2268, while the sum is 31.

Adding to 19917002002 its reverse (20020071991), we get a palindrome (39937073993).

The spelling of 19917002002 in words is "nineteen billion, nine hundred seventeen million, two thousand, two".