19495141 has 4 divisors (see below), whose sum is σ = 20641932. Its totient is φ = 18348352.

The previous prime is 19495139. The next prime is 19495153. The reversal of 19495141 is 14159491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15374241 + 4120900 = 3921^2 + 2030^2 .

It is a cyclic number.

It is not a de Polignac number, because 19495141 - 2¹ = 19495139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19495097 and 19495106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19495171) 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, 573370 + ... + 573403.

It is an arithmetic number, because the mean of its divisors is an integer number (5160483).

Almost surely, 2^19495141 is an apocalyptic number.

19495141 is the 2793-rd centered pentagonal number.

It is an amenable number.

19495141 is a deficient number, since it is larger than the sum of its proper divisors (1146791).

19495141 is a wasteful number, since it uses less digits than its factorization.

19495141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146790.

The product of its digits is 6480, while the sum is 34.

The square root of 19495141 is about 4415.3302254758. The cubic root of 19495141 is about 269.1382723112.

The spelling of 19495141 in words is "nineteen million, four hundred ninety-five thousand, one hundred forty-one".