19988253 has 6 divisors (see below), whose sum is σ = 28871934. Its totient is φ = 13325496.

The previous prime is 19988237. The next prime is 19988257. The reversal of 19988253 is 35288991.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19740249 + 248004 = 4443^2 + 498^2 .

It is not a de Polignac number, because 19988253 - 2⁴ = 19988237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19988199 and 19988208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19988257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1110450 + ... + 1110467.

It is an arithmetic number, because the mean of its divisors is an integer number (4811989).

Almost surely, 2^19988253 is an apocalyptic number.

It is an amenable number.

19988253 is a deficient number, since it is larger than the sum of its proper divisors (8883681).

19988253 is a wasteful number, since it uses less digits than its factorization.

19988253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220923 (or 2220920 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 19988253 is about 4470.8224075666. The cubic root of 19988253 is about 271.3886074785.

The spelling of 19988253 in words is "nineteen million, nine hundred eighty-eight thousand, two hundred fifty-three".