20106245 has 4 divisors (see below), whose sum is σ = 24127500. Its totient is φ = 16084992.

The previous prime is 20106227. The next prime is 20106253. The reversal of 20106245 is 54260102.

It is a happy number.

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 12609601 + 7496644 = 3551^2 + 2738^2 .

It is a cyclic number.

It is not a de Polignac number, because 20106245 - 2¹⁰ = 20105221 is a prime.

It is a super-2 number, since 2×20106245² = 808522176000050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2010620 + ... + 2010629.

It is an arithmetic number, because the mean of its divisors is an integer number (6031875).

Almost surely, 2^20106245 is an apocalyptic number.

It is an amenable number.

20106245 is a deficient number, since it is larger than the sum of its proper divisors (4021255).

20106245 is an equidigital number, since it uses as much as digits as its factorization.

20106245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021254.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20106245 is about 4483.9987734164. The cubic root of 20106245 is about 271.9215685412.

Adding to 20106245 its reverse (54260102), we get a palindrome (74366347).

The spelling of 20106245 in words is "twenty million, one hundred six thousand, two hundred forty-five".