20445030 has 24 divisors (see below), whose sum is σ = 53157312. Its totient is φ = 5451984.

The previous prime is 20445017. The next prime is 20445041. The reversal of 20445030 is 3054402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20444994 and 20445012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113494 + ... + 113673.

It is an arithmetic number, because the mean of its divisors is an integer number (2214888).

Almost surely, 2^20445030 is an apocalyptic number.

20445030 is an abundant number, since it is smaller than the sum of its proper divisors (32712282).

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

20445030 is a wasteful number, since it uses less digits than its factorization.

20445030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227180 (or 227177 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20445030 is about 4521.6180732123. The cubic root of 20445030 is about 273.4403391596.

Adding to 20445030 its reverse (3054402), we get a palindrome (23499432).

It can be divided in two parts, 204450 and 30, that added together give a triangular number (204480 = T₆₃₉).

The spelling of 20445030 in words is "twenty million, four hundred forty-five thousand, thirty".