20045527 has 4 divisors (see below), whose sum is σ = 20587336. Its totient is φ = 19503720.

The previous prime is 20045521. The next prime is 20045537. The reversal of 20045527 is 72554002.

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 20045527 - 2¹⁹ = 19521239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045521) 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, 270849 + ... + 270922.

It is an arithmetic number, because the mean of its divisors is an integer number (5146834).

Almost surely, 2^20045527 is an apocalyptic number.

20045527 is a deficient number, since it is larger than the sum of its proper divisors (541809).

20045527 is an equidigital number, since it uses as much as digits as its factorization.

20045527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541808.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 20045527 is about 4477.2231349353. The cubic root of 20045527 is about 271.6475710584.

Adding to 20045527 its reverse (72554002), we get a palindrome (92599529).

The spelling of 20045527 in words is "twenty million, forty-five thousand, five hundred twenty-seven".