20445235 has 24 divisors (see below), whose sum is σ = 26554176. Its totient is φ = 15102720.

The previous prime is 20445233. The next prime is 20445241. The reversal of 20445235 is 53254402.

It is not a de Polignac number, because 20445235 - 2¹ = 20445233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20445233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84715 + ... + 84955.

It is an arithmetic number, because the mean of its divisors is an integer number (1106424).

Almost surely, 2^20445235 is an apocalyptic number.

20445235 is a deficient number, since it is larger than the sum of its proper divisors (6108941).

20445235 is a wasteful number, since it uses less digits than its factorization.

20445235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 20445235 is about 4521.6407420316. The cubic root of 20445235 is about 273.4412530750.

Adding to 20445235 its reverse (53254402), we get a palindrome (73699637).

The spelling of 20445235 in words is "twenty million, four hundred forty-five thousand, two hundred thirty-five".