20353344052551 has 64 divisors (see below), whose sum is σ = 29068819826688. Its totient is φ = 12623043299328.

The previous prime is 20353344052549. The next prime is 20353344052553. The reversal of 20353344052551 is 15525044335302.

It is an interprime number because it is at equal distance from previous prime (20353344052549) and next prime (20353344052553).

It is not a de Polignac number, because 20353344052551 - 2¹ = 20353344052549 is a prime.

It is a super-2 number, since 2×20353344052551² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353344052553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1131549580 + ... + 1131567566.

It is an arithmetic number, because the mean of its divisors is an integer number (454200309792).

Almost surely, 2^{20353344052551} is an apocalyptic number.

20353344052551 is a deficient number, since it is larger than the sum of its proper divisors (8715475774137).

20353344052551 is a wasteful number, since it uses less digits than its factorization.

20353344052551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18920.

The product of its (nonzero) digits is 1080000, while the sum is 42.

Adding to 20353344052551 its reverse (15525044335302), we get a palindrome (35878388387853).

The spelling of 20353344052551 in words is "twenty trillion, three hundred fifty-three billion, three hundred forty-four million, fifty-two thousand, five hundred fifty-one".