20101027138715 has 4 divisors (see below), whose sum is σ = 24121232566464. Its totient is φ = 16080821710968.

The previous prime is 20101027138697. The next prime is 20101027138867. The reversal of 20101027138715 is 51783172010102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20101027138715 - 2²⁴ = 20101010361499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2010102713867 + ... + 2010102713876.

It is an arithmetic number, because the mean of its divisors is an integer number (6030308141616).

Almost surely, 2^{20101027138715} is an apocalyptic number.

20101027138715 is a deficient number, since it is larger than the sum of its proper divisors (4020205427749).

20101027138715 is an equidigital number, since it uses as much as digits as its factorization.

20101027138715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020205427748.

The product of its (nonzero) digits is 23520, while the sum is 38.

Adding to 20101027138715 its reverse (51783172010102), we get a palindrome (71884199148817).

The spelling of 20101027138715 in words is "twenty trillion, one hundred one billion, twenty-seven million, one hundred thirty-eight thousand, seven hundred fifteen".