20315334521451 has 8 divisors (see below), whose sum is σ = 27101574588880. Its totient is φ = 13536325400832.

The previous prime is 20315334521431. The next prime is 20315334521467. The reversal of 20315334521451 is 15412543351302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20315334521451 - 2⁷ = 20315334521323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20315334521431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1807730146 + ... + 1807741383.

It is an arithmetic number, because the mean of its divisors is an integer number (3387696823610).

Almost surely, 2^{20315334521451} is an apocalyptic number.

20315334521451 is a deficient number, since it is larger than the sum of its proper divisors (6786240067429).

20315334521451 is a wasteful number, since it uses less digits than its factorization.

20315334521451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3615473405.

The product of its (nonzero) digits is 216000, while the sum is 39.

Adding to 20315334521451 its reverse (15412543351302), we get a palindrome (35727877872753).

The spelling of 20315334521451 in words is "twenty trillion, three hundred fifteen billion, three hundred thirty-four million, five hundred twenty-one thousand, four hundred fifty-one".