19842953 has 4 divisors (see below), whose sum is σ = 21369348. Its totient is φ = 18316560.

The previous prime is 19842937. The next prime is 19842967. The reversal of 19842953 is 35924891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35924891 = 37 ⋅970943.

It can be written as a sum of positive squares in 2 ways, for example, as 13227769 + 6615184 = 3637^2 + 2572^2 .

It is a cyclic number.

It is not a de Polignac number, because 19842953 - 2⁴ = 19842937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19842953.

It is not an unprimeable number, because it can be changed into a prime (19842923) 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, 763178 + ... + 763203.

It is an arithmetic number, because the mean of its divisors is an integer number (5342337).

Almost surely, 2^19842953 is an apocalyptic number.

19842953 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19842953 is a deficient number, since it is larger than the sum of its proper divisors (1526395).

19842953 is a wasteful number, since it uses less digits than its factorization.

19842953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526394.

The product of its digits is 77760, while the sum is 41.

The square root of 19842953 is about 4454.5429619659. The cubic root of 19842953 is about 270.7294086055.

The spelling of 19842953 in words is "nineteen million, eight hundred forty-two thousand, nine hundred fifty-three".