19736042 has 4 divisors (see below), whose sum is σ = 29604066. Its totient is φ = 9868020.

The previous prime is 19736039. The next prime is 19736053. The reversal of 19736042 is 24063791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24063791 = 2347 ⋅10253.

It can be written as a sum of positive squares in only one way, i.e., 18567481 + 1168561 = 4309^2 + 1081^2 .

It is a super-2 number, since 2×19736042² = 779022707651528, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4934009 + ... + 4934012.

Almost surely, 2^19736042 is an apocalyptic number.

19736042 is a deficient number, since it is larger than the sum of its proper divisors (9868024).

19736042 is an equidigital number, since it uses as much as digits as its factorization.

19736042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9868023.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 19736042 is about 4442.5265334042. The cubic root of 19736042 is about 270.2423156155.

The spelling of 19736042 in words is "nineteen million, seven hundred thirty-six thousand, forty-two".