20284049 has 4 divisors (see below), whose sum is σ = 20586864. Its totient is φ = 19981236.

The previous prime is 20284031. The next prime is 20284051. The reversal of 20284049 is 94048202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20284049 is a prime.

It is a super-2 number, since 2×20284049² = 822885287668802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20284249) 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, 151307 + ... + 151440.

It is an arithmetic number, because the mean of its divisors is an integer number (5146716).

Almost surely, 2^20284049 is an apocalyptic number.

It is an amenable number.

20284049 is a deficient number, since it is larger than the sum of its proper divisors (302815).

20284049 is an equidigital number, since it uses as much as digits as its factorization.

20284049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302814.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20284049 is about 4503.7816332500. The cubic root of 20284049 is about 272.7207716262.

The spelling of 20284049 in words is "twenty million, two hundred eighty-four thousand, forty-nine".