20148129 has 8 divisors (see below), whose sum is σ = 29849120. Its totient is φ = 13432068.

The previous prime is 20148067. The next prime is 20148131. The reversal of 20148129 is 92184102.

It is not a de Polignac number, because 20148129 - 2¹³ = 20139937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 746227 = 20148129 / (2 + 0 + 1 + 4 + 8 + 1 + 2 + 9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20148329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373087 + ... + 373140.

It is an arithmetic number, because the mean of its divisors is an integer number (3731140).

Almost surely, 2^20148129 is an apocalyptic number.

It is an amenable number.

20148129 is a deficient number, since it is larger than the sum of its proper divisors (9700991).

20148129 is an equidigital number, since it uses as much as digits as its factorization.

20148129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746236 (or 746230 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 20148129 is about 4488.6667285509. Note that the first 3 decimals coincide. The cubic root of 20148129 is about 272.1102539262.

The spelling of 20148129 in words is "twenty million, one hundred forty-eight thousand, one hundred twenty-nine".