20552784 has 40 divisors (see below), whose sum is σ = 60680640. Its totient is φ = 5872128.

The previous prime is 20552773. The next prime is 20552801. The reversal of 20552784 is 48725502.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 30249 + ... + 30920.

It is an arithmetic number, because the mean of its divisors is an integer number (1517016).

Almost surely, 2^20552784 is an apocalyptic number.

20552784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20552784 is an abundant number, since it is smaller than the sum of its proper divisors (40127856).

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

20552784 is a wasteful number, since it uses less digits than its factorization.

20552784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61187 (or 61181 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 20552784 is about 4533.5178393826. The cubic root of 20552784 is about 273.9198799613.

The spelling of 20552784 in words is "twenty million, five hundred fifty-two thousand, seven hundred eighty-four".