20666697892096 has 27 divisors (see below), whose sum is σ = 41252811685981. Its totient is φ = 10333312577536.

The previous prime is 20666697892079. The next prime is 20666697892147. The reversal of 20666697892096 is 69029879666602.

The square root of 20666697892096 is 4546064.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18846573117696 + 1820124774400 = 4341264^2 + 1349120^2 .

It is a super-2 number, since 2×20666697892096² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 72594960 + ... + 72879088.

Almost surely, 2^{20666697892096} is an apocalyptic number.

20666697892096 is the 4546064-th square number.

It is an amenable number.

20666697892096 is a deficient number, since it is larger than the sum of its proper divisors (20586113793885).

20666697892096 is an frugal number, since it uses more digits than its factorization.

20666697892096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568274 (or 284131 counting only the distinct ones).

The product of its (nonzero) digits is 1269789696, while the sum is 76.

The spelling of 20666697892096 in words is "twenty trillion, six hundred sixty-six billion, six hundred ninety-seven million, eight hundred ninety-two thousand, ninety-six".