20006122249 has 3 divisors (see below), whose sum is σ = 20006263693. Its totient is φ = 20005980806.

The previous prime is 20006122247. The next prime is 20006122271. The reversal of 20006122249 is 94222160002.

The square root of 20006122249 is 141443.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 20006122249 - 2¹ = 20006122247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20006122247) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 70722 + ... + 212164.

Almost surely, 2^20006122249 is an apocalyptic number.

20006122249 is the 141443-rd square number.

20006122249 is the 70722-nd centered octagonal number.

It is an amenable number.

20006122249 is a deficient number, since it is larger than the sum of its proper divisors (141444).

20006122249 is an frugal number, since it uses more digits than its factorization.

20006122249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282886 (or 141443 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 20006122249 in words is "twenty billion, six million, one hundred twenty-two thousand, two hundred forty-nine".