20540310665 has 16 divisors (see below), whose sum is σ = 28260161280. Its totient is φ = 14039488320.

The previous prime is 20540310629. The next prime is 20540310691. The reversal of 20540310665 is 56601304502.

It is not a de Polignac number, because 20540310665 - 2⁸ = 20540310409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 932630 + ... + 954399.

It is an arithmetic number, because the mean of its divisors is an integer number (1766260080).

Almost surely, 2^20540310665 is an apocalyptic number.

It is an amenable number.

20540310665 is a deficient number, since it is larger than the sum of its proper divisors (7719850615).

20540310665 is a wasteful number, since it uses less digits than its factorization.

20540310665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1887352.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 20540310665 in words is "twenty billion, five hundred forty million, three hundred ten thousand, six hundred sixty-five".