20120523 has 4 divisors (see below), whose sum is σ = 26827368. Its totient is φ = 13413680.

The previous prime is 20120509. The next prime is 20120531. The reversal of 20120523 is 32502102.

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 20120523 - 2⁵ = 20120491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20120533) 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, 3353418 + ... + 3353423.

It is an arithmetic number, because the mean of its divisors is an integer number (6706842).

Almost surely, 2^20120523 is an apocalyptic number.

20120523 is a deficient number, since it is larger than the sum of its proper divisors (6706845).

20120523 is an equidigital number, since it uses as much as digits as its factorization.

20120523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6706844.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20120523 is about 4485.5905965659. The cubic root of 20120523 is about 271.9859196503.

Adding to 20120523 its reverse (32502102), we get a palindrome (52622625).

The spelling of 20120523 in words is "twenty million, one hundred twenty thousand, five hundred twenty-three".