19949225 has 12 divisors (see below), whose sum is σ = 25087680. Its totient is φ = 15733200.

The previous prime is 19949219. The next prime is 19949231. The reversal of 19949225 is 52294991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19949219) and next prime (19949231).

It is not a de Polignac number, because 19949225 - 2⁸ = 19948969 is a prime.

It is a Curzon number.

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 in 11 ways as a sum of consecutive naturals, for example, 3845 + ... + 7394.

It is an arithmetic number, because the mean of its divisors is an integer number (2090640).

Almost surely, 2^19949225 is an apocalyptic number.

It is an amenable number.

19949225 is a deficient number, since it is larger than the sum of its proper divisors (5138455).

19949225 is a wasteful number, since it uses less digits than its factorization.

19949225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11320 (or 11315 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 19949225 is about 4466.4555298357. The cubic root of 19949225 is about 271.2118594040.

The spelling of 19949225 in words is "nineteen million, nine hundred forty-nine thousand, two hundred twenty-five".