20814145 has 8 divisors (see below), whose sum is σ = 27247680. Its totient is φ = 15137520.

The previous prime is 20814133. The next prime is 20814161. The reversal of 20814145 is 54141802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20814145 - 2²¹ = 18716993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189165 + ... + 189274.

It is an arithmetic number, because the mean of its divisors is an integer number (3405960).

Almost surely, 2^20814145 is an apocalyptic number.

It is an amenable number.

20814145 is a deficient number, since it is larger than the sum of its proper divisors (6433535).

20814145 is a wasteful number, since it uses less digits than its factorization.

20814145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378455.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 20814145 is about 4562.2521850507. The cubic root of 20814145 is about 275.0761001511.

Adding to 20814145 its reverse (54141802), we get a palindrome (74955947).

It can be divided in two parts, 2081 and 4145, that added together give a palindrome (6226).

The spelling of 20814145 in words is "twenty million, eight hundred fourteen thousand, one hundred forty-five".