20627105 has 4 divisors (see below), whose sum is σ = 24752532. Its totient is φ = 16501680.

The previous prime is 20627081. The next prime is 20627107. The reversal of 20627105 is 50172602.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11669056 + 8958049 = 3416^2 + 2993^2 .

It is not a de Polignac number, because 20627105 - 2²⁰ = 19578529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20627107) 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, 2062706 + ... + 2062715.

It is an arithmetic number, because the mean of its divisors is an integer number (6188133).

Almost surely, 2^20627105 is an apocalyptic number.

It is an amenable number.

20627105 is a deficient number, since it is larger than the sum of its proper divisors (4125427).

20627105 is an equidigital number, since it uses as much as digits as its factorization.

20627105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125426.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20627105 is about 4541.7072781059. The cubic root of 20627105 is about 274.2496570156.

Adding to 20627105 its reverse (50172602), we get a palindrome (70799707).

The spelling of 20627105 in words is "twenty million, six hundred twenty-seven thousand, one hundred five".