20146 has 8 divisors (see below), whose sum is σ = 34560. Its totient is φ = 8628.

The previous prime is 20143. The next prime is 20147. The reversal of 20146 is 64102.

20146 is nontrivially palindromic in base 13.

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

It is a super-2 number, since 2×20146² = 811722632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706 + ... + 733.

It is an arithmetic number, because the mean of its divisors is an integer number (4320).

2²⁰¹⁴⁶ is an apocalyptic number.

20146 is a deficient number, since it is larger than the sum of its proper divisors (14414).

20146 is a wasteful number, since it uses less digits than its factorization.

20146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20146 is about 141.9366055674. The cubic root of 20146 is about 27.2100669196.

Adding to 20146 its reverse (64102), we get a palindrome (84248).

Subtracting 20146 from its reverse (64102), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 20146 in words is "twenty thousand, one hundred forty-six".