19998662 has 8 divisors (see below), whose sum is σ = 30123192. Its totient is φ = 9957600.

The previous prime is 19998653. The next prime is 19998677. The reversal of 19998662 is 26689991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 19998662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20264 + ... + 21227.

It is an arithmetic number, because the mean of its divisors is an integer number (3765399).

Almost surely, 2^19998662 is an apocalyptic number.

19998662 is a deficient number, since it is larger than the sum of its proper divisors (10124530).

19998662 is a wasteful number, since it uses less digits than its factorization.

19998662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41734.

The product of its digits is 419904, while the sum is 50.

The square root of 19998662 is about 4471.9863595499. The cubic root of 19998662 is about 271.4357083732.

The spelling of 19998662 in words is "nineteen million, nine hundred ninety-eight thousand, six hundred sixty-two".