20401335 has 16 divisors (see below), whose sum is σ = 36269280. Its totient is φ = 10880640.

The previous prime is 20401333. The next prime is 20401349. The reversal of 20401335 is 53310402.

It is not a de Polignac number, because 20401335 - 2¹ = 20401333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75426 + ... + 75695.

It is an arithmetic number, because the mean of its divisors is an integer number (2266830).

Almost surely, 2^20401335 is an apocalyptic number.

20401335 is a deficient number, since it is larger than the sum of its proper divisors (15867945).

20401335 is a wasteful number, since it uses less digits than its factorization.

20401335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151135 (or 151129 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20401335 is about 4516.7837008208. The cubic root of 20401335 is about 273.2454018496.

Adding to 20401335 its reverse (53310402), we get a palindrome (73711737).

It can be divided in two parts, 20401 and 335, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20401335 in words is "twenty million, four hundred one thousand, three hundred thirty-five".