19955238 has 16 divisors (see below), whose sum is σ = 40007856. Its totient is φ = 6635520.

The previous prime is 19955231. The next prime is 19955239. The reversal of 19955238 is 83255991.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19955238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19955231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1243 + ... + 6438.

It is an arithmetic number, because the mean of its divisors is an integer number (2500491).

Almost surely, 2^19955238 is an apocalyptic number.

19955238 is an abundant number, since it is smaller than the sum of its proper divisors (20052618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19955238 is a wasteful number, since it uses less digits than its factorization.

19955238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8119.

The product of its digits is 97200, while the sum is 42.

The square root of 19955238 is about 4467.1286079539. The cubic root of 19955238 is about 271.2391057939.

The spelling of 19955238 in words is "nineteen million, nine hundred fifty-five thousand, two hundred thirty-eight".