19955339 has 4 divisors (see below), whose sum is σ = 21005640. Its totient is φ = 18905040.

The previous prime is 19955333. The next prime is 19955359. The reversal of 19955339 is 93355991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93355991 = 67 ⋅1393373.

It is a cyclic number.

It is not a de Polignac number, because 19955339 - 2¹⁶ = 19889803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19955339.

It is not an unprimeable number, because it can be changed into a prime (19955333) by changing a digit.

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, 525122 + ... + 525159.

It is an arithmetic number, because the mean of its divisors is an integer number (5251410).

Almost surely, 2^19955339 is an apocalyptic number.

19955339 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19955339 is a deficient number, since it is larger than the sum of its proper divisors (1050301).

19955339 is a wasteful number, since it uses less digits than its factorization.

19955339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050300.

The product of its digits is 164025, while the sum is 44.

The square root of 19955339 is about 4467.1399127406. The cubic root of 19955339 is about 271.2395634032.

The spelling of 19955339 in words is "nineteen million, nine hundred fifty-five thousand, three hundred thirty-nine".