20162523 has 4 divisors (see below), whose sum is σ = 26883368. Its totient is φ = 13441680.

The previous prime is 20162503. The next prime is 20162537. The reversal of 20162523 is 32526102.

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

It is not a de Polignac number, because 20162523 - 2⁸ = 20162267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20162523.

It is not an unprimeable number, because it can be changed into a prime (20162503) 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, 3360418 + ... + 3360423.

It is an arithmetic number, because the mean of its divisors is an integer number (6720842).

Almost surely, 2^20162523 is an apocalyptic number.

20162523 is a deficient number, since it is larger than the sum of its proper divisors (6720845).

20162523 is an equidigital number, since it uses as much as digits as its factorization.

20162523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720844.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20162523 is about 4490.2698137194. The cubic root of 20162523 is about 272.1750378182.

Adding to 20162523 its reverse (32526102), we get a palindrome (52688625).

The spelling of 20162523 in words is "twenty million, one hundred sixty-two thousand, five hundred twenty-three".