19955825 has 12 divisors (see below), whose sum is σ = 25213788. Its totient is φ = 15662400.

The previous prime is 19955809. The next prime is 19955843. The reversal of 19955825 is 52855991.

It can be written as a sum of positive squares in 6 ways, for example, as 277729 + 19678096 = 527^2 + 4436^2 .

It is not a de Polignac number, because 19955825 - 2⁴ = 19955809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6206 + ... + 8855.

It is an arithmetic number, because the mean of its divisors is an integer number (2101149).

Almost surely, 2^19955825 is an apocalyptic number.

It is an amenable number.

19955825 is a deficient number, since it is larger than the sum of its proper divisors (5257963).

19955825 is a wasteful number, since it uses less digits than its factorization.

19955825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15124 (or 15119 counting only the distinct ones).

The product of its digits is 162000, while the sum is 44.

The square root of 19955825 is about 4467.1943096310. The cubic root of 19955825 is about 271.2417653428.

The spelling of 19955825 in words is "nineteen million, nine hundred fifty-five thousand, eight hundred twenty-five".