20875768 has 8 divisors (see below), whose sum is σ = 39142080. Its totient is φ = 10437880.

The previous prime is 20875759. The next prime is 20875781. The reversal of 20875768 is 86757802.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1304728 + ... + 1304743.

It is an arithmetic number, because the mean of its divisors is an integer number (4892760).

Almost surely, 2^20875768 is an apocalyptic number.

It is an amenable number.

20875768 is a deficient number, since it is larger than the sum of its proper divisors (18266312).

20875768 is a wasteful number, since it uses less digits than its factorization.

20875768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609477 (or 2609473 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 20875768 is about 4569.0007660319. Note that the first 3 decimals coincide. The cubic root of 20875768 is about 275.3472989507.

The spelling of 20875768 in words is "twenty million, eight hundred seventy-five thousand, seven hundred sixty-eight".