20310505652051 has 4 divisors (see below), whose sum is σ = 20496840566400. Its totient is φ = 20124170737704.

The previous prime is 20310505652033. The next prime is 20310505652077. The reversal of 20310505652051 is 15025650501302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20310505652051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20310505652651) 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, 93167457011 + ... + 93167457228.

It is an arithmetic number, because the mean of its divisors is an integer number (5124210141600).

Almost surely, 2^{20310505652051} is an apocalyptic number.

20310505652051 is a deficient number, since it is larger than the sum of its proper divisors (186334914349).

20310505652051 is a wasteful number, since it uses less digits than its factorization.

20310505652051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186334914348.

The product of its (nonzero) digits is 45000, while the sum is 35.

The spelling of 20310505652051 in words is "twenty trillion, three hundred ten billion, five hundred five million, six hundred fifty-two thousand, fifty-one".