19949725 has 12 divisors (see below), whose sum is σ = 24968020. Its totient is φ = 15811200.

The previous prime is 19949723. The next prime is 19949737. The reversal of 19949725 is 52794991.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3392964 + 16556761 = 1842^2 + 4069^2 .

It is not a de Polignac number, because 19949725 - 2¹ = 19949723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19949723) 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 11 ways as a sum of consecutive naturals, for example, 936 + ... + 6385.

Almost surely, 2^19949725 is an apocalyptic number.

It is an amenable number.

19949725 is a deficient number, since it is larger than the sum of its proper divisors (5018295).

19949725 is a wasteful number, since it uses less digits than its factorization.

19949725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7440 (or 7435 counting only the distinct ones).

The product of its digits is 204120, while the sum is 46.

The square root of 19949725 is about 4466.5115022801. The cubic root of 19949725 is about 271.2141252363.

The spelling of 19949725 in words is "nineteen million, nine hundred forty-nine thousand, seven hundred twenty-five".