20535868 has 12 divisors (see below), whose sum is σ = 36274392. Its totient is φ = 10171760.

The previous prime is 20535859. The next prime is 20535869. The reversal of 20535868 is 86853502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535869) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 23563 + ... + 24418.

It is an arithmetic number, because the mean of its divisors is an integer number (3022866).

Almost surely, 2^20535868 is an apocalyptic number.

It is an amenable number.

20535868 is a deficient number, since it is larger than the sum of its proper divisors (15738524).

20535868 is a wasteful number, since it uses less digits than its factorization.

20535868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48092 (or 48090 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 20535868 is about 4531.6517959790. The cubic root of 20535868 is about 273.8447092770.

It can be divided in two parts, 2053 and 5868, that added together give a square (7921 = 89²).

The spelling of 20535868 in words is "twenty million, five hundred thirty-five thousand, eight hundred sixty-eight".