20525220451351 has 32 divisors (see below), whose sum is σ = 27102882742272. Its totient is φ = 15048590261760.

The previous prime is 20525220451321. The next prime is 20525220451403. The reversal of 20525220451351 is 15315402252502.

It is a de Polignac number, because none of the positive numbers 2^k-20525220451351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20525220451351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525220451321) 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 31 ways as a sum of consecutive naturals, for example, 2374570 + ... + 6832936.

It is an arithmetic number, because the mean of its divisors is an integer number (846965085696).

Almost surely, 2^{20525220451351} is an apocalyptic number.

20525220451351 is a deficient number, since it is larger than the sum of its proper divisors (6577662290921).

20525220451351 is a wasteful number, since it uses less digits than its factorization.

20525220451351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461919.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 20525220451351 in words is "twenty trillion, five hundred twenty-five billion, two hundred twenty million, four hundred fifty-one thousand, three hundred fifty-one".