20535955 has 16 divisors (see below), whose sum is σ = 27328608. Its totient is φ = 14688000.

The previous prime is 20535947. The next prime is 20536013. The reversal of 20535955 is 55953502.

It is not a de Polignac number, because 20535955 - 2³ = 20535947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20535955.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295 + ... + 6415.

It is an arithmetic number, because the mean of its divisors is an integer number (1708038).

Almost surely, 2^20535955 is an apocalyptic number.

20535955 is a deficient number, since it is larger than the sum of its proper divisors (6792653).

20535955 is a wasteful number, since it uses less digits than its factorization.

20535955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6198.

The product of its (nonzero) digits is 33750, while the sum is 34.

The square root of 20535955 is about 4531.6613951177. The cubic root of 20535955 is about 273.8450959899.

It can be divided in two parts, 2053 and 5955, that added together give a palindrome (8008).

The spelling of 20535955 in words is "twenty million, five hundred thirty-five thousand, nine hundred fifty-five".