20549120 has 80 divisors (see below), whose sum is σ = 51559200. Its totient is φ = 7839744.

The previous prime is 20549071. The next prime is 20549153. The reversal of 20549120 is 2194502.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58706 + ... + 59054.

It is an arithmetic number, because the mean of its divisors is an integer number (644490).

Almost surely, 2^20549120 is an apocalyptic number.

20549120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20549120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25779600).

20549120 is an abundant number, since it is smaller than the sum of its proper divisors (31010080).

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

20549120 is an equidigital number, since it uses as much as digits as its factorization.

20549120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20549120 is about 4533.1137201707. The cubic root of 20549120 is about 273.9036015163.

The spelling of 20549120 in words is "twenty million, five hundred forty-nine thousand, one hundred twenty".