19938494 has 16 divisors (see below), whose sum is σ = 30870720. Its totient is φ = 9653280.

The previous prime is 19938473. The next prime is 19938517. The reversal of 19938494 is 49483991.

It is a Curzon number.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 7184 + ... + 9564.

It is an arithmetic number, because the mean of its divisors is an integer number (1929420).

Almost surely, 2^19938494 is an apocalyptic number.

19938494 is a deficient number, since it is larger than the sum of its proper divisors (10932226).

19938494 is a wasteful number, since it uses less digits than its factorization.

19938494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515.

The product of its digits is 279936, while the sum is 47.

The square root of 19938494 is about 4465.2540801168. The cubic root of 19938494 is about 271.1632209821.

The spelling of 19938494 in words is "nineteen million, nine hundred thirty-eight thousand, four hundred ninety-four".