19712133 has 16 divisors (see below), whose sum is σ = 33375360. Its totient is φ = 11263968.

The previous prime is 19712123. The next prime is 19712153. The reversal of 19712133 is 33121791.

It is not a de Polignac number, because 19712133 - 2¹⁴ = 19695749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 19712097 and 19712106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19712123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51960 + ... + 52337.

It is an arithmetic number, because the mean of its divisors is an integer number (2085960).

Almost surely, 2^19712133 is an apocalyptic number.

It is an amenable number.

19712133 is a deficient number, since it is larger than the sum of its proper divisors (13663227).

19712133 is a wasteful number, since it uses less digits than its factorization.

19712133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104313 (or 104307 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 19712133 is about 4439.8347942238. The cubic root of 19712133 is about 270.1331442088.

It can be divided in two parts, 1971213 and 3, that added together give a square (1971216 = 1404²).

The spelling of 19712133 in words is "nineteen million, seven hundred twelve thousand, one hundred thirty-three".