20519841 has 16 divisors (see below), whose sum is σ = 28901376. Its totient is φ = 12923856.

The previous prime is 20519839. The next prime is 20519857. The reversal of 20519841 is 14891502.

It is a happy number.

It is not a de Polignac number, because 20519841 - 2¹ = 20519839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20519799 and 20519808.

It is not an unprimeable number, because it can be changed into a prime (20519801) 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, 3936 + ... + 7518.

It is an arithmetic number, because the mean of its divisors is an integer number (1806336).

Almost surely, 2^20519841 is an apocalyptic number.

It is an amenable number.

20519841 is a deficient number, since it is larger than the sum of its proper divisors (8381535).

20519841 is a wasteful number, since it uses less digits than its factorization.

20519841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3692.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 20519841 is about 4529.8831110747. The cubic root of 20519841 is about 273.7734510049.

The spelling of 20519841 in words is "twenty million, five hundred nineteen thousand, eight hundred forty-one".