20519141 has 4 divisors (see below), whose sum is σ = 20707500. Its totient is φ = 20330784.

The previous prime is 20519129. The next prime is 20519159. The reversal of 20519141 is 14191502.

It is a happy number.

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 5387041 + 15132100 = 2321^2 + 3890^2 .

It is a cyclic number.

It is not a de Polignac number, because 20519141 - 2⁶ = 20519077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20519171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94016 + ... + 94233.

It is an arithmetic number, because the mean of its divisors is an integer number (5176875).

Almost surely, 2^20519141 is an apocalyptic number.

It is an amenable number.

20519141 is a deficient number, since it is larger than the sum of its proper divisors (188359).

20519141 is a wasteful number, since it uses less digits than its factorization.

20519141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188358.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 20519141 is about 4529.8058457289. The cubic root of 20519141 is about 273.7703378620.

The spelling of 20519141 in words is "twenty million, five hundred nineteen thousand, one hundred forty-one".