20440035 has 96 divisors (see below), whose sum is σ = 46904832. Its totient is φ = 7971840.

The previous prime is 20439959. The next prime is 20440039. The reversal of 20440035 is 53004402.

It is a happy number.

It is not a de Polignac number, because 20440035 - 2¹² = 20435939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20440039) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 58732 + ... + 59078.

It is an arithmetic number, because the mean of its divisors is an integer number (488592).

Almost surely, 2^20440035 is an apocalyptic number.

20440035 is an abundant number, since it is smaller than the sum of its proper divisors (26464797).

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

20440035 is a wasteful number, since it uses less digits than its factorization.

20440035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 390 counting only the distinct ones).

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

The square root of 20440035 is about 4521.0656929534. The cubic root of 20440035 is about 273.4180689430.

Adding to 20440035 its reverse (53004402), we get a palindrome (73444437).

The spelling of 20440035 in words is "twenty million, four hundred forty thousand, thirty-five".