19495 has 8 divisors (see below), whose sum is σ = 26784. Its totient is φ = 13344.

The previous prime is 19489. The next prime is 19501. The reversal of 19495 is 59491.

19495 = T₂₀ + T₂₁ + ... + T₄₉.

It is an interprime number because it is at equal distance from previous prime (19489) and next prime (19501).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19495 - 2⁵ = 19463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244 + ... + 313.

It is an arithmetic number, because the mean of its divisors is an integer number (3348).

2¹⁹⁴⁹⁵ is an apocalyptic number.

19495 is a deficient number, since it is larger than the sum of its proper divisors (7289).

19495 is an equidigital number, since it uses as much as digits as its factorization.

19495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569.

The product of its digits is 1620, while the sum is 28.

The square root of 19495 is about 139.6244964181. The cubic root of 19495 is about 26.9137623456.

Adding to 19495 its product of digits (1620), we get a triangular number (21115 = T₂₀₅).

It can be divided in two parts, 194 and 95, that added together give a square (289 = 17²).

The spelling of 19495 in words is "nineteen thousand, four hundred ninety-five".