20148523 has 4 divisors (see below), whose sum is σ = 20229048. Its totient is φ = 20068000.

The previous prime is 20148521. The next prime is 20148539. The reversal of 20148523 is 32584102.

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 20148523 - 2¹ = 20148521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20148521) 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, 39886 + ... + 40387.

It is an arithmetic number, because the mean of its divisors is an integer number (5057262).

Almost surely, 2^20148523 is an apocalyptic number.

20148523 is a deficient number, since it is larger than the sum of its proper divisors (80525).

20148523 is an equidigital number, since it uses as much as digits as its factorization.

20148523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80524.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20148523 is about 4488.7106166471. The cubic root of 20148523 is about 272.1120276350.

The spelling of 20148523 in words is "twenty million, one hundred forty-eight thousand, five hundred twenty-three".