20584940 has 12 divisors (see below), whose sum is σ = 43228416. Its totient is φ = 8233968.

The previous prime is 20584903. The next prime is 20584957. The reversal of 20584940 is 4948502.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20584897 and 20584906.

It is an unprimeable number.

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, 514604 + ... + 514643.

It is an arithmetic number, because the mean of its divisors is an integer number (3602368).

Almost surely, 2^20584940 is an apocalyptic number.

20584940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20584940 is an abundant number, since it is smaller than the sum of its proper divisors (22643476).

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

20584940 is a wasteful number, since it uses less digits than its factorization.

20584940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029256 (or 1029254 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20584940 is about 4537.0629266079. The cubic root of 20584940 is about 274.0626599373.

The spelling of 20584940 in words is "twenty million, five hundred eighty-four thousand, nine hundred forty".