20411459 has 4 divisors (see below), whose sum is σ = 20421240. Its totient is φ = 20401680.

The previous prime is 20411431. The next prime is 20411473. The reversal of 20411459 is 95411402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 95411402 = 2 ⋅47705701.

It is a cyclic number.

It is not a de Polignac number, because 20411459 - 2¹² = 20407363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20411359) 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, 362 + ... + 6399.

It is an arithmetic number, because the mean of its divisors is an integer number (5105310).

Almost surely, 2^20411459 is an apocalyptic number.

20411459 is a deficient number, since it is larger than the sum of its proper divisors (9781).

20411459 is an equidigital number, since it uses as much as digits as its factorization.

20411459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9780.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 20411459 is about 4517.9042707875. The cubic root of 20411459 is about 273.2905929933.

The spelling of 20411459 in words is "twenty million, four hundred eleven thousand, four hundred fifty-nine".