20814066 has 96 divisors (see below), whose sum is σ = 56504448. Its totient is φ = 5391360.

The previous prime is 20814061. The next prime is 20814067. The reversal of 20814066 is 66041802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20814061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158821 + ... + 158951.

It is an arithmetic number, because the mean of its divisors is an integer number (588588).

Almost surely, 2^20814066 is an apocalyptic number.

20814066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20814066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28252224).

20814066 is an abundant number, since it is smaller than the sum of its proper divisors (35690382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20814066 is a wasteful number, since it uses less digits than its factorization.

20814066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20814066 is about 4562.2435270380. The cubic root of 20814066 is about 275.0757521340.

Adding to 20814066 its reverse (66041802), we get a palindrome (86855868).

The spelling of 20814066 in words is "twenty million, eight hundred fourteen thousand, sixty-six".