20674 has 4 divisors (see below), whose sum is σ = 31014. Its totient is φ = 10336.

The previous prime is 20663. The next prime is 20681. The reversal of 20674 is 47602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47602 = 2 ⋅23801.

It can be written as a sum of positive squares in only one way, i.e., 20449 + 225 = 143^2 + 15^2 .

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5167 + ... + 5170.

2²⁰⁶⁷⁴ is an apocalyptic number.

20674 is a deficient number, since it is larger than the sum of its proper divisors (10340).

20674 is a wasteful number, since it uses less digits than its factorization.

20674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10339.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 20674 is about 143.7845610627. The cubic root of 20674 is about 27.4457332041.

The spelling of 20674 in words is "twenty thousand, six hundred seventy-four".