20342523 has 16 divisors (see below), whose sum is σ = 28922400. Its totient is φ = 12673536.

The previous prime is 20342503. The next prime is 20342527. The reversal of 20342523 is 32524302.

It is not a de Polignac number, because 20342523 - 2⁹ = 20342011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20342523.

It is not an unprimeable number, because it can be changed into a prime (20342527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6261 + ... + 8937.

It is an arithmetic number, because the mean of its divisors is an integer number (1807650).

Almost surely, 2^20342523 is an apocalyptic number.

20342523 is a deficient number, since it is larger than the sum of its proper divisors (8579877).

20342523 is a wasteful number, since it uses less digits than its factorization.

20342523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 20342523 is about 4510.2686172777. The cubic root of 20342523 is about 272.9825828494.

Adding to 20342523 its reverse (32524302), we get a palindrome (52866825).

The spelling of 20342523 in words is "twenty million, three hundred forty-two thousand, five hundred twenty-three".