19725448 has 32 divisors (see below), whose sum is σ = 38122560. Its totient is φ = 9564480.

The previous prime is 19725443. The next prime is 19725449. The reversal of 19725448 is 84452791.

It is a self number, because there is not a number n which added to its sum of digits gives 19725448.

It is not an unprimeable number, because it can be changed into a prime (19725443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40261 + ... + 40747.

It is an arithmetic number, because the mean of its divisors is an integer number (1191330).

Almost surely, 2^19725448 is an apocalyptic number.

It is an amenable number.

19725448 is a deficient number, since it is larger than the sum of its proper divisors (18397112).

19725448 is a wasteful number, since it uses less digits than its factorization.

19725448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 633 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 19725448 is about 4441.3340338236. The cubic root of 19725448 is about 270.1939530055.

The spelling of 19725448 in words is "nineteen million, seven hundred twenty-five thousand, four hundred forty-eight".