20016535 has 16 divisors (see below), whose sum is σ = 29947392. Its totient is φ = 12477600.

The previous prime is 20016523. The next prime is 20016539. The reversal of 20016535 is 53561002.

It is a happy number.

It is not a de Polignac number, because 20016535 - 2¹³ = 20008343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20016539) 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, 25611 + ... + 26380.

It is an arithmetic number, because the mean of its divisors is an integer number (1871712).

Almost surely, 2^20016535 is an apocalyptic number.

20016535 is a deficient number, since it is larger than the sum of its proper divisors (9930857).

20016535 is a wasteful number, since it uses less digits than its factorization.

20016535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52014.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 20016535 is about 4473.9842422610. The cubic root of 20016535 is about 271.5165458795.

Adding to 20016535 its reverse (53561002), we get a palindrome (73577537).

The spelling of 20016535 in words is "twenty million, sixteen thousand, five hundred thirty-five".