20870268 has 12 divisors (see below), whose sum is σ = 48697320. Its totient is φ = 6956752.

The previous prime is 20870263. The next prime is 20870293. The reversal of 20870268 is 86207802.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20870263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869583 + ... + 869606.

It is an arithmetic number, because the mean of its divisors is an integer number (4058110).

Almost surely, 2^20870268 is an apocalyptic number.

It is an amenable number.

20870268 is an abundant number, since it is smaller than the sum of its proper divisors (27827052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20870268 is a wasteful number, since it uses less digits than its factorization.

20870268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739196 (or 1739194 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 20870268 is about 4568.3988442342. The cubic root of 20870268 is about 275.3231155185.

The spelling of 20870268 in words is "twenty million, eight hundred seventy thousand, two hundred sixty-eight".