20282930 has 8 divisors (see below), whose sum is σ = 36509292. Its totient is φ = 8113168.

The previous prime is 20282929. The next prime is 20282939. The reversal of 20282930 is 3928202.

It can be written as a sum of positive squares in 2 ways, for example, as 18722929 + 1560001 = 4327^2 + 1249^2 .

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

It is a super-2 number, since 2×20282930² = 822794498769800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20282930.

It is not an unprimeable number, because it can be changed into a prime (20282939) 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, 1014137 + ... + 1014156.

Almost surely, 2^20282930 is an apocalyptic number.

20282930 is a deficient number, since it is larger than the sum of its proper divisors (16226362).

20282930 is a wasteful number, since it uses less digits than its factorization.

20282930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028300.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20282930 is about 4503.6574026007. The cubic root of 20282930 is about 272.7157565171.

It can be divided in two parts, 20282 and 930, that added together give a palindrome (21212).

The spelling of 20282930 in words is "twenty million, two hundred eighty-two thousand, nine hundred thirty".