20353530 has 16 divisors (see below), whose sum is σ = 48848544. Its totient is φ = 5427600.

The previous prime is 20353523. The next prime is 20353559. The reversal of 20353530 is 3535302.

It is a junction number, because it is equal to n+sod(n) for n = 20353497 and 20353506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339196 + ... + 339255.

It is an arithmetic number, because the mean of its divisors is an integer number (3053034).

Almost surely, 2^20353530 is an apocalyptic number.

20353530 is an abundant number, since it is smaller than the sum of its proper divisors (28495014).

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

20353530 is a wasteful number, since it uses less digits than its factorization.

20353530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678461.

The product of its (nonzero) digits is 1350, while the sum is 21.

The square root of 20353530 is about 4511.4886678346. The cubic root of 20353530 is about 273.0318094132.

Adding to 20353530 its reverse (3535302), we get a palindrome (23888832).

It can be divided in two parts, 2035 and 3530, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 20353530 in words is "twenty million, three hundred fifty-three thousand, five hundred thirty".