20722566165346 has 4 divisors (see below), whose sum is σ = 31083849248022. Its totient is φ = 10361283082672.

The previous prime is 20722566165341. The next prime is 20722566165347. The reversal of 20722566165346 is 64356166522702.

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

It can be written as a sum of positive squares in only one way, i.e., 17296324443225 + 3426241722121 = 4158885^2 + 1851011^2 .

It is a super-2 number, since 2×20722566165346² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20722566165341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5180641541335 + ... + 5180641541338.

Almost surely, 2^{20722566165346} is an apocalyptic number.

20722566165346 is a deficient number, since it is larger than the sum of its proper divisors (10361283082676).

20722566165346 is a wasteful number, since it uses less digits than its factorization.

20722566165346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10361283082675.

The product of its (nonzero) digits is 21772800, while the sum is 55.

The spelling of 20722566165346 in words is "twenty trillion, seven hundred twenty-two billion, five hundred sixty-six million, one hundred sixty-five thousand, three hundred forty-six".