20553307975365 has 64 divisors (see below), whose sum is σ = 38783637872640. Its totient is φ = 9185598339840.

The previous prime is 20553307975351. The next prime is 20553307975367. The reversal of 20553307975365 is 56357970335502.

It is not a de Polignac number, because 20553307975365 - 2⁹ = 20553307974853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20553307975299 and 20553307975308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553307975367) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 88479669 + ... + 88711658.

It is an arithmetic number, because the mean of its divisors is an integer number (605994341760).

Almost surely, 2^{20553307975365} is an apocalyptic number.

It is an amenable number.

20553307975365 is a deficient number, since it is larger than the sum of its proper divisors (18230329897275).

20553307975365 is a wasteful number, since it uses less digits than its factorization.

20553307975365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177191402.

The product of its (nonzero) digits is 89302500, while the sum is 60.

The spelling of 20553307975365 in words is "twenty trillion, five hundred fifty-three billion, three hundred seven million, nine hundred seventy-five thousand, three hundred sixty-five".