19985493 has 16 divisors (see below), whose sum is σ = 29145600. Its totient is φ = 12080880.

The previous prime is 19985467. The next prime is 19985501. The reversal of 19985493 is 39458991.

It is not a de Polignac number, because 19985493 - 2⁵ = 19985461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19985443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21288 + ... + 22206.

It is an arithmetic number, because the mean of its divisors is an integer number (1821600).

Almost surely, 2^19985493 is an apocalyptic number.

It is an amenable number.

19985493 is a deficient number, since it is larger than the sum of its proper divisors (9160107).

19985493 is a wasteful number, since it uses less digits than its factorization.

19985493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592.

The product of its digits is 349920, while the sum is 48.

The square root of 19985493 is about 4470.5137288683. The cubic root of 19985493 is about 271.3761156909.

The spelling of 19985493 in words is "nineteen million, nine hundred eighty-five thousand, four hundred ninety-three".