19988466 has 16 divisors (see below), whose sum is σ = 40031904. Its totient is φ = 6653664.

The previous prime is 19988461. The next prime is 19988467. The reversal of 19988466 is 66488991.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19988461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3606 + ... + 7278.

It is an arithmetic number, because the mean of its divisors is an integer number (2501994).

Almost surely, 2^19988466 is an apocalyptic number.

19988466 is an abundant number, since it is smaller than the sum of its proper divisors (20043438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19988466 is a wasteful number, since it uses less digits than its factorization.

19988466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585.

The product of its digits is 746496, while the sum is 51.

The square root of 19988466 is about 4470.8462286238. The cubic root of 19988466 is about 271.3895714709.

The spelling of 19988466 in words is "nineteen million, nine hundred eighty-eight thousand, four hundred sixty-six".