20282390 has 8 divisors (see below), whose sum is σ = 36508320. Its totient is φ = 8112952.

The previous prime is 20282387. The next prime is 20282399. The reversal of 20282390 is 9328202.

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

It is a super-2 number, since 2×20282390² = 822750688224200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20282399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1014110 + ... + 1014129.

It is an arithmetic number, because the mean of its divisors is an integer number (4563540).

Almost surely, 2^20282390 is an apocalyptic number.

20282390 is a deficient number, since it is larger than the sum of its proper divisors (16225930).

20282390 is a wasteful number, since it uses less digits than its factorization.

20282390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028246.

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

The square root of 20282390 is about 4503.5974509274. The cubic root of 20282390 is about 272.7133362912.

The spelling of 20282390 in words is "twenty million, two hundred eighty-two thousand, three hundred ninety".