20647141755751 has 32 divisors (see below), whose sum is σ = 24338016073728. Its totient is φ = 17147614498560.

The previous prime is 20647141755739. The next prime is 20647141755809. The reversal of 20647141755751 is 15755714174602.

It is not a de Polignac number, because 20647141755751 - 2¹¹ = 20647141753703 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20647141755692 and 20647141755701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20647141755551) 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, 93747906 + ... + 93967888.

It is an arithmetic number, because the mean of its divisors is an integer number (760563002304).

Almost surely, 2^{20647141755751} is an apocalyptic number.

20647141755751 is a deficient number, since it is larger than the sum of its proper divisors (3690874317977).

20647141755751 is a wasteful number, since it uses less digits than its factorization.

20647141755751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222271.

The product of its (nonzero) digits is 8232000, while the sum is 55.

The spelling of 20647141755751 in words is "twenty trillion, six hundred forty-seven billion, one hundred forty-one million, seven hundred fifty-five thousand, seven hundred fifty-one".