20705166993 has 32 divisors (see below), whose sum is σ = 32374847232. Its totient is φ = 11523456000.

The previous prime is 20705166971. The next prime is 20705167009. The reversal of 20705166993 is 39966150702.

It is not a de Polignac number, because 20705166993 - 2¹⁷ = 20705035921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20705166893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 497455 + ... + 537467.

It is an arithmetic number, because the mean of its divisors is an integer number (1011713976).

Almost surely, 2^20705166993 is an apocalyptic number.

It is an amenable number.

20705166993 is a deficient number, since it is larger than the sum of its proper divisors (11669680239).

20705166993 is a wasteful number, since it uses less digits than its factorization.

20705166993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40665.

The product of its (nonzero) digits is 612360, while the sum is 48.

The spelling of 20705166993 in words is "twenty billion, seven hundred five million, one hundred sixty-six thousand, nine hundred ninety-three".