20084840 has 16 divisors (see below), whose sum is σ = 45190980. Its totient is φ = 8033920.

The previous prime is 20084783. The next prime is 20084851. The reversal of 20084840 is 4848002.

It can be written as a sum of positive squares in 2 ways, for example, as 17255716 + 2829124 = 4154^2 + 1682^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251021 + ... + 251100.

Almost surely, 2^20084840 is an apocalyptic number.

20084840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20084840 is an abundant number, since it is smaller than the sum of its proper divisors (25106140).

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

20084840 is a wasteful number, since it uses less digits than its factorization.

20084840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502132 (or 502128 counting only the distinct ones).

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

The square root of 20084840 is about 4481.6113173724. The cubic root of 20084840 is about 271.8250388663.

The spelling of 20084840 in words is "twenty million, eighty-four thousand, eight hundred forty".