20539180 has 24 divisors (see below), whose sum is σ = 43655472. Its totient is φ = 8116032.

The previous prime is 20539159. The next prime is 20539199. The reversal of 20539180 is 8193502.

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 7 ways as a sum of consecutive naturals, for example, 4527 + ... + 7846.

It is an arithmetic number, because the mean of its divisors is an integer number (1818978).

Almost surely, 2^20539180 is an apocalyptic number.

20539180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20539180 is an abundant number, since it is smaller than the sum of its proper divisors (23116292).

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

20539180 is a wasteful number, since it uses less digits than its factorization.

20539180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12465 (or 12463 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 20539180 is about 4532.0172109117. The cubic root of 20539180 is about 273.8594302670.

The spelling of 20539180 in words is "twenty million, five hundred thirty-nine thousand, one hundred eighty".