20553666735 has 16 divisors (see below), whose sum is σ = 37583847936. Its totient is φ = 9395961888.

The previous prime is 20553666719. The next prime is 20553666739. The reversal of 20553666735 is 53766635502.

It is not a de Polignac number, because 20553666735 - 2⁴ = 20553666719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553666739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97874499 + ... + 97874708.

It is an arithmetic number, because the mean of its divisors is an integer number (2348990496).

Almost surely, 2^20553666735 is an apocalyptic number.

20553666735 is a deficient number, since it is larger than the sum of its proper divisors (17030181201).

20553666735 is a wasteful number, since it uses less digits than its factorization.

20553666735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195749222.

The product of its (nonzero) digits is 3402000, while the sum is 48.

The spelling of 20553666735 in words is "twenty billion, five hundred fifty-three million, six hundred sixty-six thousand, seven hundred thirty-five".