20864152 has 16 divisors (see below), whose sum is σ = 40178160. Its totient is φ = 10149984.

The previous prime is 20864149. The next prime is 20864153. The reversal of 20864152 is 25146802.

It is a self number, because there is not a number n which added to its sum of digits gives 20864152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20864153) 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, 34948 + ... + 35539.

It is an arithmetic number, because the mean of its divisors is an integer number (2511135).

Almost surely, 2^20864152 is an apocalyptic number.

It is an amenable number.

20864152 is a deficient number, since it is larger than the sum of its proper divisors (19314008).

20864152 is a wasteful number, since it uses less digits than its factorization.

20864152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70530 (or 70526 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 20864152 is about 4567.7294140525. The cubic root of 20864152 is about 275.2962185522.

The spelling of 20864152 in words is "twenty million, eight hundred sixty-four thousand, one hundred fifty-two".