20148871 has 4 divisors (see below), whose sum is σ = 20404000. Its totient is φ = 19893744.

The previous prime is 20148857. The next prime is 20148883. The reversal of 20148871 is 17884102.

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 20148871 - 2⁵ = 20148839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20148841) 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, 127446 + ... + 127603.

It is an arithmetic number, because the mean of its divisors is an integer number (5101000).

Almost surely, 2^20148871 is an apocalyptic number.

20148871 is a deficient number, since it is larger than the sum of its proper divisors (255129).

20148871 is an equidigital number, since it uses as much as digits as its factorization.

20148871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255128.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 20148871 is about 4488.7493803954. The cubic root of 20148871 is about 272.1135942418.

The spelling of 20148871 in words is "twenty million, one hundred forty-eight thousand, eight hundred seventy-one".