19718492 has 12 divisors (see below), whose sum is σ = 35697480. Its totient is φ = 9519216.

The previous prime is 19718483. The next prime is 19718497. The reversal of 19718492 is 29481791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19718497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84878 + ... + 85109.

It is an arithmetic number, because the mean of its divisors is an integer number (2974790).

Almost surely, 2^19718492 is an apocalyptic number.

It is an amenable number.

19718492 is a deficient number, since it is larger than the sum of its proper divisors (15978988).

19718492 is a wasteful number, since it uses less digits than its factorization.

19718492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170020 (or 170018 counting only the distinct ones).

The product of its digits is 36288, while the sum is 41.

The square root of 19718492 is about 4440.5508667281. The cubic root of 19718492 is about 270.1621887907.

The spelling of 19718492 in words is "nineteen million, seven hundred eighteen thousand, four hundred ninety-two".