20284466 has 4 divisors (see below), whose sum is σ = 30426702. Its totient is φ = 10142232.

The previous prime is 20284441. The next prime is 20284469. The reversal of 20284466 is 66448202.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 15768841 + 4515625 = 3971^2 + 2125^2 .

It is a super-2 number, since 2×20284466² = 822919121810312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20284469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5071115 + ... + 5071118.

Almost surely, 2^20284466 is an apocalyptic number.

20284466 is a deficient number, since it is larger than the sum of its proper divisors (10142236).

20284466 is a wasteful number, since it uses less digits than its factorization.

20284466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10142235.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 20284466 is about 4503.8279274413. The cubic root of 20284466 is about 272.7226404802.

The spelling of 20284466 in words is "twenty million, two hundred eighty-four thousand, four hundred sixty-six".