20351315454101 has 4 divisors (see below), whose sum is σ = 20847689001804. Its totient is φ = 19854941906400.

The previous prime is 20351315454089. The next prime is 20351315454161. The reversal of 20351315454101 is 10145451315302.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3934629288100 + 16416686166001 = 1983590^2 + 4051751^2 .

It is a cyclic number.

It is not a de Polignac number, because 20351315454101 - 2³⁰ = 20350241712277 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 (20351315454161) 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, 248186773790 + ... + 248186773871.

It is an arithmetic number, because the mean of its divisors is an integer number (5211922250451).

Almost surely, 2^{20351315454101} is an apocalyptic number.

It is an amenable number.

20351315454101 is a deficient number, since it is larger than the sum of its proper divisors (496373547703).

20351315454101 is an equidigital number, since it uses as much as digits as its factorization.

20351315454101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496373547702.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 20351315454101 its reverse (10145451315302), we get a palindrome (30496766769403).

The spelling of 20351315454101 in words is "twenty trillion, three hundred fifty-one billion, three hundred fifteen million, four hundred fifty-four thousand, one hundred one".