20814405 has 32 divisors (see below), whose sum is σ = 35328000. Its totient is φ = 10435392.

The previous prime is 20814403. The next prime is 20814439. The reversal of 20814405 is 50441802.

It is not a de Polignac number, because 20814405 - 2¹ = 20814403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20814403) 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 31 ways as a sum of consecutive naturals, for example, 56532 + ... + 56898.

It is an arithmetic number, because the mean of its divisors is an integer number (1104000).

Almost surely, 2^20814405 is an apocalyptic number.

It is an amenable number.

20814405 is a deficient number, since it is larger than the sum of its proper divisors (14513595).

20814405 is a wasteful number, since it uses less digits than its factorization.

20814405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20814405 is about 4562.2806796601. The cubic root of 20814405 is about 275.0772455179.

The spelling of 20814405 in words is "twenty million, eight hundred fourteen thousand, four hundred five".