20540530 has 32 divisors (see below), whose sum is σ = 37997568. Its totient is φ = 7992000.

The previous prime is 20540519. The next prime is 20540537. The reversal of 20540530 is 3504502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20540498 and 20540507.

It is not an unprimeable number, because it can be changed into a prime (20540537) 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, 91999 + ... + 92221.

It is an arithmetic number, because the mean of its divisors is an integer number (1187424).

Almost surely, 2^20540530 is an apocalyptic number.

20540530 is a deficient number, since it is larger than the sum of its proper divisors (17457038).

20540530 is a wasteful number, since it uses less digits than its factorization.

20540530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 20540530 is about 4532.1661487637. The cubic root of 20540530 is about 273.8654302166.

The spelling of 20540530 in words is "twenty million, five hundred forty thousand, five hundred thirty".