20567220 has 48 divisors (see below), whose sum is σ = 57805440. Its totient is φ = 5463936.

The previous prime is 20567213. The next prime is 20567231. The reversal of 20567220 is 2276502.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 21921 + ... + 22839.

It is an arithmetic number, because the mean of its divisors is an integer number (1204280).

Almost surely, 2^20567220 is an apocalyptic number.

20567220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20567220 is an abundant number, since it is smaller than the sum of its proper divisors (37238220).

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

20567220 is a wasteful number, since it uses less digits than its factorization.

20567220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304 (or 1302 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20567220 is about 4535.1097009885. The cubic root of 20567220 is about 273.9839975026.

The spelling of 20567220 in words is "twenty million, five hundred sixty-seven thousand, two hundred twenty".