20530750 has 32 divisors (see below), whose sum is σ = 39390624. Its totient is φ = 8008000.

The previous prime is 20530723. The next prime is 20530759. The reversal of 20530750 is 5703502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530759) by changing a digit.

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, 9249 + ... + 11251.

It is an arithmetic number, because the mean of its divisors is an integer number (1230957).

Almost surely, 2^20530750 is an apocalyptic number.

20530750 is a deficient number, since it is larger than the sum of its proper divisors (18859874).

20530750 is a wasteful number, since it uses less digits than its factorization.

20530750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061 (or 2051 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 20530750 is about 4531.0870660361. The cubic root of 20530750 is about 273.8219579675.

The spelling of 20530750 in words is "twenty million, five hundred thirty thousand, seven hundred fifty".