19900002 has 8 divisors (see below), whose sum is σ = 39800016. Its totient is φ = 6633332.

The previous prime is 19899989. The next prime is 19900009. The reversal of 19900002 is 20000991.

It is a happy number.

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

19900002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (19900009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658328 + ... + 1658339.

It is an arithmetic number, because the mean of its divisors is an integer number (4975002).

Almost surely, 2^19900002 is an apocalyptic number.

19900002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19900002 is a wasteful number, since it uses less digits than its factorization.

19900002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3316672.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 19900002 is about 4460.9418288070. The cubic root of 19900002 is about 270.9886116954.

Adding to 19900002 its reverse (20000991), we get a palindrome (39900993).

The spelling of 19900002 in words is "nineteen million, nine hundred thousand, two".