20875151 has 4 divisors (see below), whose sum is σ = 22772904. Its totient is φ = 18977400.

The previous prime is 20875139. The next prime is 20875181. The reversal of 20875151 is 15157802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20875151 - 2¹⁰ = 20874127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20875111) 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, 948860 + ... + 948881.

It is an arithmetic number, because the mean of its divisors is an integer number (5693226).

Almost surely, 2^20875151 is an apocalyptic number.

20875151 is a deficient number, since it is larger than the sum of its proper divisors (1897753).

20875151 is a wasteful number, since it uses less digits than its factorization.

20875151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897752.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 20875151 is about 4568.9332452992. The cubic root of 20875151 is about 275.3445862209.

It can be divided in two parts, 208751 and 51, that added together give a palindrome (208802).

The spelling of 20875151 in words is "twenty million, eight hundred seventy-five thousand, one hundred fifty-one".