19939252 has 12 divisors (see below), whose sum is σ = 36410976. Its totient is φ = 9536120.

The previous prime is 19939237. The next prime is 19939273. The reversal of 19939252 is 25293991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108274 + ... + 108457.

It is an arithmetic number, because the mean of its divisors is an integer number (3034248).

Almost surely, 2^19939252 is an apocalyptic number.

It is an amenable number.

19939252 is a deficient number, since it is larger than the sum of its proper divisors (16471724).

19939252 is a wasteful number, since it uses less digits than its factorization.

19939252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216758 (or 216756 counting only the distinct ones).

The product of its digits is 43740, while the sum is 40.

The square root of 19939252 is about 4465.3389568990. The cubic root of 19939252 is about 271.1666572015.

The spelling of 19939252 in words is "nineteen million, nine hundred thirty-nine thousand, two hundred fifty-two".