20284277 has 8 divisors (see below), whose sum is σ = 22122240. Its totient is φ = 18486000.

The previous prime is 20284273. The next prime is 20284279. The reversal of 20284277 is 77248202.

It is a happy number.

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

It is not a de Polignac number, because 20284277 - 2² = 20284273 is a prime.

It is a super-2 number, since 2×20284277² = 822903786825458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20284273) 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 7 ways as a sum of consecutive naturals, for example, 8849 + ... + 10902.

It is an arithmetic number, because the mean of its divisors is an integer number (2765280).

Almost surely, 2^20284277 is an apocalyptic number.

It is an amenable number.

20284277 is a deficient number, since it is larger than the sum of its proper divisors (1837963).

20284277 is a wasteful number, since it uses less digits than its factorization.

20284277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19843.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 20284277 is about 4503.8069452409. The cubic root of 20284277 is about 272.7217934488.

The spelling of 20284277 in words is "twenty million, two hundred eighty-four thousand, two hundred seventy-seven".