19918002 has 32 divisors (see below), whose sum is σ = 43182720. Its totient is φ = 6124560.

The previous prime is 19918001. The next prime is 19918007. The reversal of 19918002 is 20081991.

It is not an unprimeable number, because it can be changed into a prime (19918001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12427 + ... + 13937.

It is an arithmetic number, because the mean of its divisors is an integer number (1349460).

Almost surely, 2^19918002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19918002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21591360).

19918002 is an abundant number, since it is smaller than the sum of its proper divisors (23264718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19918002 is a wasteful number, since it uses less digits than its factorization.

19918002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555 (or 1529 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 19918002 is about 4462.9588839692. The cubic root of 19918002 is about 271.0702921739.

Adding to 19918002 its reverse (20081991), we get a palindrome (39999993).

The spelling of 19918002 in words is "nineteen million, nine hundred eighteen thousand, two".