19621252 has 12 divisors (see below), whose sum is σ = 39242560. Its totient is φ = 8409096.

The previous prime is 19621249. The next prime is 19621253. The reversal of 19621252 is 25212691.

19621252 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 700759 = 19621252 / (1 + 9 + 6 + 2 + 1 + 2 + 5 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 19621252.

It is not an unprimeable number, because it can be changed into a prime (19621253) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 350352 + ... + 350407.

Almost surely, 2^19621252 is an apocalyptic number.

It is an amenable number.

19621252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19621252 is a wasteful number, since it uses less digits than its factorization.

19621252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700770 (or 700768 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 19621252 is about 4429.5882427151. The cubic root of 19621252 is about 269.7173631315.

The spelling of 19621252 in words is "nineteen million, six hundred twenty-one thousand, two hundred fifty-two".