20315650456103 has 4 divisors (see below), whose sum is σ = 20461806214920. Its totient is φ = 20169494697288.

The previous prime is 20315650456051. The next prime is 20315650456109. The reversal of 20315650456103 is 30165405651302.

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 20315650456103 - 2³⁸ = 20040772549159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315650456109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73077879200 + ... + 73077879477.

It is an arithmetic number, because the mean of its divisors is an integer number (5115451553730).

Almost surely, 2^{20315650456103} is an apocalyptic number.

20315650456103 is a deficient number, since it is larger than the sum of its proper divisors (146155758817).

20315650456103 is a wasteful number, since it uses less digits than its factorization.

20315650456103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146155758816.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 20315650456103 in words is "twenty trillion, three hundred fifteen billion, six hundred fifty million, four hundred fifty-six thousand, one hundred three".