20013461 has 8 divisors (see below), whose sum is σ = 21849240. Its totient is φ = 18220032.

The previous prime is 20013443. The next prime is 20013463. The reversal of 20013461 is 16431002.

It can be written as a sum of positive squares in 4 ways, for example, as 5808100 + 14205361 = 2410^2 + 3769^2 .

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 20013461 - 2²² = 15819157 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 (20013463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9596 + ... + 11493.

It is an arithmetic number, because the mean of its divisors is an integer number (2731155).

Almost surely, 2^20013461 is an apocalyptic number.

It is an amenable number.

20013461 is a deficient number, since it is larger than the sum of its proper divisors (1835779).

20013461 is a wasteful number, since it uses less digits than its factorization.

20013461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21175.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20013461 is about 4473.6406874044. The cubic root of 20013461 is about 271.5026459614.

Adding to 20013461 its reverse (16431002), we get a palindrome (36444463).

The spelling of 20013461 in words is "twenty million, thirteen thousand, four hundred sixty-one".