19900003 has 8 divisors (see below), whose sum is σ = 20646000. Its totient is φ = 19158048.

The previous prime is 19899989. The next prime is 19900009. The reversal of 19900003 is 30000991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19900003 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12073 + ... + 13621.

It is an arithmetic number, because the mean of its divisors is an integer number (2580750).

Almost surely, 2^19900003 is an apocalyptic number.

19900003 is a deficient number, since it is larger than the sum of its proper divisors (745997).

19900003 is a wasteful number, since it uses less digits than its factorization.

19900003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 19900003 is about 4460.9419408910. The cubic root of 19900003 is about 270.9886162345.

Adding to 19900003 its reverse (30000991), we get a palindrome (49900994).

The spelling of 19900003 in words is "nineteen million, nine hundred thousand, three".