20873413 has 4 divisors (see below), whose sum is σ = 22771008. Its totient is φ = 18975820.

The previous prime is 20873393. The next prime is 20873423. The reversal of 20873413 is 31437802.

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 a de Polignac number, because none of the positive numbers 2^k-20873413 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 (20873423) 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 3 ways as a sum of consecutive naturals, for example, 948781 + ... + 948802.

It is an arithmetic number, because the mean of its divisors is an integer number (5692752).

Almost surely, 2^20873413 is an apocalyptic number.

It is an amenable number.

20873413 is a deficient number, since it is larger than the sum of its proper divisors (1897595).

20873413 is a wasteful number, since it uses less digits than its factorization.

20873413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897594.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20873413 is about 4568.7430437704. The cubic root of 20873413 is about 275.3369445648.

The spelling of 20873413 in words is "twenty million, eight hundred seventy-three thousand, four hundred thirteen".