19990002 has 32 divisors (see below), whose sum is σ = 40884480. Its totient is φ = 6514560.

The previous prime is 19989997. The next prime is 19990031. The reversal of 19990002 is 20009991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85678 + ... + 85910.

It is an arithmetic number, because the mean of its divisors is an integer number (1277640).

Almost surely, 2^19990002 is an apocalyptic number.

19990002 is an abundant number, since it is smaller than the sum of its proper divisors (20894478).

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

19990002 is a wasteful number, since it uses less digits than its factorization.

19990002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 19990002 is about 4471.0180048843. The cubic root of 19990002 is about 271.3965228748.

Adding to 19990002 its reverse (20009991), we get a palindrome (39999993).

The spelling of 19990002 in words is "nineteen million, nine hundred ninety thousand, two".