19943002 has 4 divisors (see below), whose sum is σ = 29914506. Its totient is φ = 9971500.

The previous prime is 19942987. The next prime is 19943017. The reversal of 19943002 is 20034991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (19942987) and next prime (19943017).

It can be written as a sum of positive squares in only one way, i.e., 14130081 + 5812921 = 3759^2 + 2411^2 .

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 as a sum of consecutive naturals, namely, 4985749 + ... + 4985752.

Almost surely, 2^19943002 is an apocalyptic number.

19943002 is a deficient number, since it is larger than the sum of its proper divisors (9971504).

19943002 is an equidigital number, since it uses as much as digits as its factorization.

19943002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9971503.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 19943002 is about 4465.7588380924. The cubic root of 19943002 is about 271.1836556864.

Adding to 19943002 its reverse (20034991), we get a palindrome (39977993).

The spelling of 19943002 in words is "nineteen million, nine hundred forty-three thousand, two".