19939239 has 6 divisors (see below), whose sum is σ = 28801136. Its totient is φ = 13292820.

The previous prime is 19939237. The next prime is 19939273. The reversal of 19939239 is 93293991.

It is not a de Polignac number, because 19939239 - 2¹ = 19939237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19939194 and 19939203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19939237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1107727 + ... + 1107744.

Almost surely, 2^19939239 is an apocalyptic number.

19939239 is a deficient number, since it is larger than the sum of its proper divisors (8861897).

19939239 is a wasteful number, since it uses less digits than its factorization.

19939239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215477 (or 2215474 counting only the distinct ones).

The product of its digits is 118098, while the sum is 45.

The square root of 19939239 is about 4465.3375012422. The cubic root of 19939239 is about 271.1665982697.

The spelling of 19939239 in words is "nineteen million, nine hundred thirty-nine thousand, two hundred thirty-nine".