18969648 has 20 divisors (see below), whose sum is σ = 49005048. Its totient is φ = 6323200.

The previous prime is 18969647. The next prime is 18969653. The reversal of 18969648 is 84696981.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18969648.

It is not an unprimeable number, because it can be changed into a prime (18969647) 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, 197553 + ... + 197648.

Almost surely, 2^18969648 is an apocalyptic number.

It is an amenable number.

18969648 is an abundant number, since it is smaller than the sum of its proper divisors (30035400).

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

18969648 is a wasteful number, since it uses less digits than its factorization.

18969648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395212 (or 395206 counting only the distinct ones).

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

The square root of 18969648 is about 4355.4159388054. The cubic root of 18969648 is about 266.6979990962.

The spelling of 18969648 in words is "eighteen million, nine hundred sixty-nine thousand, six hundred forty-eight".