19669225 has 9 divisors (see below), whose sum is σ = 24417367. Its totient is φ = 15717640.

The previous prime is 19669213. The next prime is 19669229. The reversal of 19669225 is 52296691.

The square root of 19669225 is 4435.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7080921 + 12588304 = 2661^2 + 3548^2 .

It is not a de Polignac number, because 19669225 - 2¹¹ = 19667177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19669229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21732 + ... + 22618.

Almost surely, 2^19669225 is an apocalyptic number.

19669225 is the 4435-th square number.

19669225 is the 2218-th centered octagonal number.

It is an amenable number.

19669225 is a deficient number, since it is larger than the sum of its proper divisors (4748142).

19669225 is an frugal number, since it uses more digits than its factorization.

19669225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784 (or 892 counting only the distinct ones).

The product of its digits is 58320, while the sum is 40.

The cubic root of 19669225 is about 269.9369994756.

The spelling of 19669225 in words is "nineteen million, six hundred sixty-nine thousand, two hundred twenty-five".