20615016106 has 4 divisors (see below), whose sum is σ = 30922524162. Its totient is φ = 10307508052.

The previous prime is 20615016101. The next prime is 20615016133. The reversal of 20615016106 is 60161051602.

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

It can be written as a sum of positive squares in only one way, i.e., 20464733025 + 150283081 = 143055^2 + 12259^2 .

It is not an unprimeable number, because it can be changed into a prime (20615016101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5153754025 + ... + 5153754028.

Almost surely, 2^20615016106 is an apocalyptic number.

20615016106 is a deficient number, since it is larger than the sum of its proper divisors (10307508056).

20615016106 is a wasteful number, since it uses less digits than its factorization.

20615016106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10307508055.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 20615016106 its reverse (60161051602), we get a palindrome (80776067708).

The spelling of 20615016106 in words is "twenty billion, six hundred fifteen million, sixteen thousand, one hundred six".