20550075 has 48 divisors (see below), whose sum is σ = 41830656. Its totient is φ = 8668800.

The previous prime is 20550073. The next prime is 20550121. The reversal of 20550075 is 57005502.

It is not a de Polignac number, because 20550075 - 2¹ = 20550073 is a prime.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20550071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5320 + ... + 8330.

It is an arithmetic number, because the mean of its divisors is an integer number (871472).

Almost surely, 2^20550075 is an apocalyptic number.

20550075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20550075 is an abundant number, since it is smaller than the sum of its proper divisors (21280581).

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

20550075 is a wasteful number, since it uses less digits than its factorization.

20550075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044 (or 3039 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 24.

The square root of 20550075 is about 4533.2190549322. The cubic root of 20550075 is about 273.9078445835.

Adding to 20550075 its reverse (57005502), we get a palindrome (77555577).

The spelling of 20550075 in words is "twenty million, five hundred fifty thousand, seventy-five".