20284982 has 4 divisors (see below), whose sum is σ = 30427476. Its totient is φ = 10142490.

The previous prime is 20284981. The next prime is 20285003. The reversal of 20284982 is 28948202.

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

It is a super-2 number, since 2×20284982² = 822960989480648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20284981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5071244 + ... + 5071247.

It is an arithmetic number, because the mean of its divisors is an integer number (7606869).

Almost surely, 2^20284982 is an apocalyptic number.

20284982 is a deficient number, since it is larger than the sum of its proper divisors (10142494).

20284982 is a wasteful number, since it uses less digits than its factorization.

20284982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10142493.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 20284982 is about 4503.8852116811. The cubic root of 20284982 is about 272.7249529836.

It can be divided in two parts, 202 and 84982, that added together give a cube (85184 = 44³).

The spelling of 20284982 in words is "twenty million, two hundred eighty-four thousand, nine hundred eighty-two".