19688949 has 24 divisors (see below), whose sum is σ = 33059520. Its totient is φ = 11058048.

The previous prime is 19688927. The next prime is 19688953. The reversal of 19688949 is 94988691.

It is not a de Polignac number, because 19688949 - 2¹⁶ = 19623413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19688895 and 19688904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19688549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1069 + ... + 6365.

It is an arithmetic number, because the mean of its divisors is an integer number (1377480).

Almost surely, 2^19688949 is an apocalyptic number.

It is an amenable number.

19688949 is a deficient number, since it is larger than the sum of its proper divisors (13370571).

19688949 is a wasteful number, since it uses less digits than its factorization.

19688949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5369 (or 5366 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 19688949 is about 4437.2231181224. The cubic root of 19688949 is about 270.0271989061.

The spelling of 19688949 in words is "nineteen million, six hundred eighty-eight thousand, nine hundred forty-nine".