19764225 has 72 divisors (see below), whose sum is σ = 39606840. Its totient is φ = 9354240.

The previous prime is 19764221. The next prime is 19764229. The reversal of 19764225 is 52246791.

19764225 is a `hidden beast` number, since 1 + 9 + 7 + 642 + 2 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (19764221) and next prime (19764229).

It can be written as a sum of positive squares in 12 ways, for example, as 11675889 + 8088336 = 3417^2 + 2844^2 .

It is not a de Polignac number, because 19764225 - 2² = 19764221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19764225.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19764221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 84709 + ... + 84941.

It is an arithmetic number, because the mean of its divisors is an integer number (550095).

Almost surely, 2^19764225 is an apocalyptic number.

19764225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19764225 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

19764225 is a wasteful number, since it uses less digits than its factorization.

19764225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 283 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 19764225 is about 4445.6973581205. The cubic root of 19764225 is about 270.3708894659.

The spelling of 19764225 in words is "nineteen million, seven hundred sixty-four thousand, two hundred twenty-five".