20284671 has 8 divisors (see below), whose sum is σ = 29505024. Its totient is φ = 12293720.

The previous prime is 20284669. The next prime is 20284697. The reversal of 20284671 is 17648202.

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

It is a cyclic number.

It is not a de Polignac number, because 20284671 - 2¹ = 20284669 is a prime.

It is a super-2 number, since 2×20284671² = 822935755156482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20284651) 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, 307311 + ... + 307376.

It is an arithmetic number, because the mean of its divisors is an integer number (3688128).

Almost surely, 2^20284671 is an apocalyptic number.

20284671 is a deficient number, since it is larger than the sum of its proper divisors (9220353).

20284671 is a wasteful number, since it uses less digits than its factorization.

20284671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614701.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 20284671 is about 4503.8506858021. The cubic root of 20284671 is about 272.7235592121.

The spelling of 20284671 in words is "twenty million, two hundred eighty-four thousand, six hundred seventy-one".