20727530 has 16 divisors (see below), whose sum is σ = 38513664. Its totient is φ = 8023440.

The previous prime is 20727529. The next prime is 20727587. The reversal of 20727530 is 3572702.

It is a self number, because there is not a number n which added to its sum of digits gives 20727530.

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, 33122 + ... + 33741.

It is an arithmetic number, because the mean of its divisors is an integer number (2407104).

Almost surely, 2^20727530 is an apocalyptic number.

20727530 is a deficient number, since it is larger than the sum of its proper divisors (17786134).

20727530 is a wasteful number, since it uses less digits than its factorization.

20727530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66901.

The product of its (nonzero) digits is 2940, while the sum is 26.

The square root of 20727530 is about 4552.7497185767. The cubic root of 20727530 is about 274.6940067542.

The spelling of 20727530 in words is "twenty million, seven hundred twenty-seven thousand, five hundred thirty".