20404041 has 32 divisors (see below), whose sum is σ = 32256000. Its totient is φ = 11466000.

The previous prime is 20404039. The next prime is 20404049. The reversal of 20404041 is 14040402.

It is not a de Polignac number, because 20404041 - 2¹ = 20404039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20404041.

It is not an unprimeable number, because it can be changed into a prime (20404049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81166 + ... + 81416.

It is an arithmetic number, because the mean of its divisors is an integer number (1008000).

Almost surely, 2^20404041 is an apocalyptic number.

20404041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20404041 is a deficient number, since it is larger than the sum of its proper divisors (11851959).

20404041 is an equidigital number, since it uses as much as digits as its factorization.

20404041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 20404041 is about 4517.0832403222. The cubic root of 20404041 is about 273.2574822579.

Adding to 20404041 its reverse (14040402), we get a palindrome (34444443).

The spelling of 20404041 in words is "twenty million, four hundred four thousand, forty-one".