20868152 has 8 divisors (see below), whose sum is σ = 39127800. Its totient is φ = 10434072.

The previous prime is 20868151. The next prime is 20868157. The reversal of 20868152 is 25186802.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20868151) 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 as a sum of consecutive naturals, namely, 1304252 + ... + 1304267.

It is an arithmetic number, because the mean of its divisors is an integer number (4890975).

Almost surely, 2^20868152 is an apocalyptic number.

It is an amenable number.

20868152 is a deficient number, since it is larger than the sum of its proper divisors (18259648).

20868152 is a wasteful number, since it uses less digits than its factorization.

20868152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608525 (or 2608521 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 20868152 is about 4568.1672473761. The cubic root of 20868152 is about 275.3138103609.

The spelling of 20868152 in words is "twenty million, eight hundred sixty-eight thousand, one hundred fifty-two".