19988949 has 8 divisors (see below), whose sum is σ = 26697600. Its totient is φ = 13303136.

The previous prime is 19988873. The next prime is 19988951. The reversal of 19988949 is 94988991.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 19988949 - 2¹⁹ = 19464661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19988989) 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, 3549 + ... + 7250.

It is an arithmetic number, because the mean of its divisors is an integer number (3337200).

Almost surely, 2^19988949 is an apocalyptic number.

It is an amenable number.

19988949 is a deficient number, since it is larger than the sum of its proper divisors (6708651).

19988949 is a wasteful number, since it uses less digits than its factorization.

19988949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11419.

The product of its digits is 1679616, while the sum is 57.

The square root of 19988949 is about 4470.9002449171. The cubic root of 19988949 is about 271.3917573999.

The spelling of 19988949 in words is "nineteen million, nine hundred eighty-eight thousand, nine hundred forty-nine".