20330341645451 has 4 divisors (see below), whose sum is σ = 20373875568072. Its totient is φ = 20286807722832.

The previous prime is 20330341645447. The next prime is 20330341645487. The reversal of 20330341645451 is 15454614303302.

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 20330341645451 - 2² = 20330341645447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20330341645399 and 20330341645408.

It is not an unprimeable number, because it can be changed into a prime (20330341645151) 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, 21766960610 + ... + 21766961543.

It is an arithmetic number, because the mean of its divisors is an integer number (5093468892018).

Almost surely, 2^{20330341645451} is an apocalyptic number.

20330341645451 is a deficient number, since it is larger than the sum of its proper divisors (43533922621).

20330341645451 is an equidigital number, since it uses as much as digits as its factorization.

20330341645451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43533922620.

The product of its (nonzero) digits is 518400, while the sum is 41.

Adding to 20330341645451 its reverse (15454614303302), we get a palindrome (35784955948753).

The spelling of 20330341645451 in words is "twenty trillion, three hundred thirty billion, three hundred forty-one million, six hundred forty-five thousand, four hundred fifty-one".