19942825 has 24 divisors (see below), whose sum is σ = 28623168. Its totient is φ = 13500480.

The previous prime is 19942823. The next prime is 19942829. The reversal of 19942825 is 52824991.

It is not a de Polignac number, because 19942825 - 2¹ = 19942823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19942823) 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 23 ways as a sum of consecutive naturals, for example, 13839 + ... + 15211.

It is an arithmetic number, because the mean of its divisors is an integer number (1192632).

Almost surely, 2^19942825 is an apocalyptic number.

It is an amenable number.

19942825 is a deficient number, since it is larger than the sum of its proper divisors (8680343).

19942825 is a wasteful number, since it uses less digits than its factorization.

19942825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473 (or 1468 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 19942825 is about 4465.7390205877. The cubic root of 19942825 is about 271.1828534058.

The spelling of 19942825 in words is "nineteen million, nine hundred forty-two thousand, eight hundred twenty-five".