20840164353 has 16 divisors (see below), whose sum is σ = 31938950400. Its totient is φ = 13414358160.

The previous prime is 20840164309. The next prime is 20840164393. The reversal of 20840164353 is 35346104802.

20840164353 is a `hidden beast` number, since 2 + 0 + 8 + 4 + 0 + 1 + 643 + 5 + 3 = 666.

It is not a de Polignac number, because 20840164353 - 2¹⁰ = 20840163329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20840164393) 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, 13307113 + ... + 13308678.

It is an arithmetic number, because the mean of its divisors is an integer number (1996184400).

Almost surely, 2^20840164353 is an apocalyptic number.

It is an amenable number.

20840164353 is a deficient number, since it is larger than the sum of its proper divisors (11098786047).

20840164353 is a wasteful number, since it uses less digits than its factorization.

20840164353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26615829 (or 26615823 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

It can be divided in two parts, 20840 and 164353, that added together give a cube (185193 = 57³).

The spelling of 20840164353 in words is "twenty billion, eight hundred forty million, one hundred sixty-four thousand, three hundred fifty-three".