20345320653211 has 4 divisors (see below), whose sum is σ = 21416127003400. Its totient is φ = 19274514303024.

The previous prime is 20345320653199. The next prime is 20345320653221. The reversal of 20345320653211 is 11235602354302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20345320653211 - 2⁷ = 20345320653083 is a prime.

It is a super-2 number, since 2×20345320653211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345320653221) 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 3 ways as a sum of consecutive naturals, for example, 535403175066 + ... + 535403175103.

It is an arithmetic number, because the mean of its divisors is an integer number (5354031750850).

Almost surely, 2^{20345320653211} is an apocalyptic number.

20345320653211 is a deficient number, since it is larger than the sum of its proper divisors (1070806350189).

20345320653211 is a wasteful number, since it uses less digits than its factorization.

20345320653211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070806350188.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 20345320653211 in words is "twenty trillion, three hundred forty-five billion, three hundred twenty million, six hundred fifty-three thousand, two hundred eleven".