20854283 has 4 divisors (see below), whose sum is σ = 21013608. Its totient is φ = 20694960.

The previous prime is 20854279. The next prime is 20854297. The reversal of 20854283 is 38245802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20854283 - 2² = 20854279 is a prime.

It is a super-2 number, since 2×20854283² = 869802238888178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20851283) 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, 79466 + ... + 79727.

It is an arithmetic number, because the mean of its divisors is an integer number (5253402).

Almost surely, 2^20854283 is an apocalyptic number.

20854283 is a deficient number, since it is larger than the sum of its proper divisors (159325).

20854283 is a wasteful number, since it uses less digits than its factorization.

20854283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159324.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 20854283 is about 4566.6489902334. The cubic root of 20854283 is about 275.2528055430.

The spelling of 20854283 in words is "twenty million, eight hundred fifty-four thousand, two hundred eighty-three".