20282840 has 16 divisors (see below), whose sum is σ = 45636480. Its totient is φ = 8113120.

The previous prime is 20282839. The next prime is 20282851. The reversal of 20282840 is 4828202.

It is a super-2 number, since 2×20282840² = 822787196931200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253496 + ... + 253575.

It is an arithmetic number, because the mean of its divisors is an integer number (2852280).

Almost surely, 2^20282840 is an apocalyptic number.

20282840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20282840 is an abundant number, since it is smaller than the sum of its proper divisors (25353640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20282840 is a wasteful number, since it uses less digits than its factorization.

20282840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507082 (or 507078 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 20282840 is about 4503.6474107106. The cubic root of 20282840 is about 272.7153531491.

The spelling of 20282840 in words is "twenty million, two hundred eighty-two thousand, eight hundred forty".