19142705 has 16 divisors (see below), whose sum is σ = 23466240. Its totient is φ = 14988288.

The previous prime is 19142701. The next prime is 19142707. The reversal of 19142705 is 50724191.

It is a cyclic number.

It is not a de Polignac number, because 19142705 - 2² = 19142701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19142701) 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, 79976 + ... + 80214.

It is an arithmetic number, because the mean of its divisors is an integer number (1466640).

Almost surely, 2^19142705 is an apocalyptic number.

It is an amenable number.

19142705 is a deficient number, since it is larger than the sum of its proper divisors (4323535).

19142705 is a wasteful number, since it uses less digits than its factorization.

19142705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 19142705 is about 4375.2377078280. The cubic root of 19142705 is about 267.5065593640.

Adding to 19142705 its reverse (50724191), we get a palindrome (69866896).

The spelling of 19142705 in words is "nineteen million, one hundred forty-two thousand, seven hundred five".