20616146 has 8 divisors (see below), whose sum is σ = 31097520. Its totient is φ = 10250308.

The previous prime is 20616143. The next prime is 20616161. The reversal of 20616146 is 64161602.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20616143) 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 3 ways as a sum of consecutive naturals, for example, 28436 + ... + 29151.

It is an arithmetic number, because the mean of its divisors is an integer number (3887190).

Almost surely, 2^20616146 is an apocalyptic number.

20616146 is a deficient number, since it is larger than the sum of its proper divisors (10481374).

20616146 is a wasteful number, since it uses less digits than its factorization.

20616146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57768.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20616146 is about 4540.5006331901. The cubic root of 20616146 is about 274.2010795991.

Adding to 20616146 its reverse (64161602), we get a palindrome (84777748).

The spelling of 20616146 in words is "twenty million, six hundred sixteen thousand, one hundred forty-six".