20868835 has 16 divisors (see below), whose sum is σ = 27901440. Its totient is φ = 14878080.

The previous prime is 20868833. The next prime is 20868839. The reversal of 20868835 is 53886802.

It is not a de Polignac number, because 20868835 - 2¹ = 20868833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20868833) 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, 3651 + ... + 7420.

It is an arithmetic number, because the mean of its divisors is an integer number (1743840).

Almost surely, 2^20868835 is an apocalyptic number.

20868835 is a deficient number, since it is larger than the sum of its proper divisors (7032605).

20868835 is a wasteful number, since it uses less digits than its factorization.

20868835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11118.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 20868835 is about 4568.2420032218. The cubic root of 20868835 is about 275.3168139375.

The spelling of 20868835 in words is "twenty million, eight hundred sixty-eight thousand, eight hundred thirty-five".