19945625 has 40 divisors (see below), whose sum is σ = 29390592. Its totient is φ = 13248000.

The previous prime is 19945621. The next prime is 19945691. The reversal of 19945625 is 52654991.

It is not a de Polignac number, because 19945625 - 2² = 19945621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19945621) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 205577 + ... + 205673.

Almost surely, 2^19945625 is an apocalyptic number.

It is an amenable number.

19945625 is a deficient number, since it is larger than the sum of its proper divisors (9444967).

19945625 is an frugal number, since it uses more digits than its factorization.

19945625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 156 counting only the distinct ones).

The product of its digits is 97200, while the sum is 41.

The square root of 19945625 is about 4466.0525075283. The cubic root of 19945625 is about 271.1955442935.

The spelling of 19945625 in words is "nineteen million, nine hundred forty-five thousand, six hundred twenty-five".