19397938 has 16 divisors (see below), whose sum is σ = 33312960. Its totient is φ = 8298576.

The previous prime is 19397929. The next prime is 19397977. The reversal of 19397938 is 83979391.

It is a junction number, because it is equal to n+sod(n) for n = 19397891 and 19397900.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11220 + ... + 12832.

It is an arithmetic number, because the mean of its divisors is an integer number (2082060).

Almost surely, 2^19397938 is an apocalyptic number.

19397938 is a deficient number, since it is larger than the sum of its proper divisors (13915022).

19397938 is a wasteful number, since it uses less digits than its factorization.

19397938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481.

The product of its digits is 367416, while the sum is 49.

The square root of 19397938 is about 4404.3090263968. The cubic root of 19397938 is about 268.6902179629.

It can be divided in two parts, 1 and 9397938, that added together give a palindrome (9397939).

The spelling of 19397938 in words is "nineteen million, three hundred ninety-seven thousand, nine hundred thirty-eight".