20659788452416 has 21 divisors (see below), whose sum is σ = 40996839867091. Its totient is φ = 10329876044992.

The previous prime is 20659788452399. The next prime is 20659788452461. The reversal of 20659788452416 is 61425488795602.

The square root of 20659788452416 is 4545304.

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

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, 36078351 + ... + 36646513.

Almost surely, 2^{20659788452416} is an apocalyptic number.

20659788452416 is the 4545304-th square number.

It is an amenable number.

20659788452416 is a deficient number, since it is larger than the sum of its proper divisors (20337051414675).

20659788452416 is an frugal number, since it uses more digits than its factorization.

20659788452416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136338 (or 568165 counting only the distinct ones).

The product of its (nonzero) digits is 232243200, while the sum is 67.

The spelling of 20659788452416 in words is "twenty trillion, six hundred fifty-nine billion, seven hundred eighty-eight million, four hundred fifty-two thousand, four hundred sixteen".