20650530 has 32 divisors (see below), whose sum is σ = 52171200. Its totient is φ = 5216832.

The previous prime is 20650519. The next prime is 20650541. The reversal of 20650530 is 3505602.

It is an interprime number because it is at equal distance from previous prime (20650519) and next prime (20650541).

It is a junction number, because it is equal to n+sod(n) for n = 20650497 and 20650506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17545 + ... + 18684.

It is an arithmetic number, because the mean of its divisors is an integer number (1630350).

Almost surely, 2^20650530 is an apocalyptic number.

20650530 is an abundant number, since it is smaller than the sum of its proper divisors (31520670).

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

20650530 is a wasteful number, since it uses less digits than its factorization.

20650530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36258.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20650530 is about 4544.2854223739. The cubic root of 20650530 is about 274.3534341872.

The spelling of 20650530 in words is "twenty million, six hundred fifty thousand, five hundred thirty".