20671052102215 has 16 divisors (see below), whose sum is σ = 24845557690368. Its totient is φ = 16509985994656.

The previous prime is 20671052102203. The next prime is 20671052102249. The reversal of 20671052102215 is 51220125017602.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20671052102215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20988714 + ... + 21951496.

It is an arithmetic number, because the mean of its divisors is an integer number (1552847355648).

Almost surely, 2^{20671052102215} is an apocalyptic number.

20671052102215 is a deficient number, since it is larger than the sum of its proper divisors (4174505588153).

20671052102215 is an equidigital number, since it uses as much as digits as its factorization.

20671052102215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969758.

The product of its (nonzero) digits is 16800, while the sum is 34.

Adding to 20671052102215 its reverse (51220125017602), we get a palindrome (71891177119817).

The spelling of 20671052102215 in words is "twenty trillion, six hundred seventy-one billion, fifty-two million, one hundred two thousand, two hundred fifteen".