20571516716662 has 8 divisors (see below), whose sum is σ = 31082510659896. Its totient is φ = 10210679830032.

The previous prime is 20571516716657. The next prime is 20571516716669. The reversal of 20571516716662 is 26661761517502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20571516716662² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20571516716669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37539263808 + ... + 37539264355.

It is an arithmetic number, because the mean of its divisors is an integer number (3885313832487).

Almost surely, 2^{20571516716662} is an apocalyptic number.

20571516716662 is a deficient number, since it is larger than the sum of its proper divisors (10510993943234).

20571516716662 is a wasteful number, since it uses less digits than its factorization.

20571516716662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75078528302.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 20571516716662 in words is "twenty trillion, five hundred seventy-one billion, five hundred sixteen million, seven hundred sixteen thousand, six hundred sixty-two".