20308461 has 4 divisors (see below), whose sum is σ = 27077952. Its totient is φ = 13538972.

The previous prime is 20308447. The next prime is 20308481. The reversal of 20308461 is 16480302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20308461 - 2¹⁰ = 20307437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20308411) 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, 3384741 + ... + 3384746.

It is an arithmetic number, because the mean of its divisors is an integer number (6769488).

Almost surely, 2^20308461 is an apocalyptic number.

It is an amenable number.

20308461 is a deficient number, since it is larger than the sum of its proper divisors (6769491).

20308461 is an equidigital number, since it uses as much as digits as its factorization.

20308461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6769490.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20308461 is about 4506.4909852345. The cubic root of 20308461 is about 272.8301349066.

Adding to 20308461 its reverse (16480302), we get a palindrome (36788763).

The spelling of 20308461 in words is "twenty million, three hundred eight thousand, four hundred sixty-one".