19813252 has 6 divisors (see below), whose sum is σ = 34673198. Its totient is φ = 9906624.

The previous prime is 19813237. The next prime is 19813289. The reversal of 19813252 is 25231891.

It can be written as a sum of positive squares in only one way, i.e., 12716356 + 7096896 = 3566^2 + 2664^2 .

It is a super-3 number, since 3×19813252³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2476653 + ... + 2476660.

Almost surely, 2^19813252 is an apocalyptic number.

It is an amenable number.

19813252 is a deficient number, since it is larger than the sum of its proper divisors (14859946).

19813252 is a wasteful number, since it uses less digits than its factorization.

19813252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953317 (or 4953315 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 19813252 is about 4451.2079259455. The cubic root of 19813252 is about 270.5942649199.

The spelling of 19813252 in words is "nineteen million, eight hundred thirteen thousand, two hundred fifty-two".