20774 has 16 divisors (see below), whose sum is σ = 36288. Its totient is φ = 8832.

The previous prime is 20773. The next prime is 20789. The reversal of 20774 is 47702.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419 + ... + 465.

It is an arithmetic number, because the mean of its divisors is an integer number (2268).

2²⁰⁷⁷⁴ is an apocalyptic number.

20774 is a deficient number, since it is larger than the sum of its proper divisors (15514).

20774 is a wasteful number, since it uses less digits than its factorization.

20774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79.

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 20774 is about 144.1318840507. The cubic root of 20774 is about 27.4899136564.

The spelling of 20774 in words is "twenty thousand, seven hundred seventy-four", and thus it is an iban number.