20378940604416 has 171 divisors, whose sum is σ = 58892421038191. Its totient is φ = 6790668877824.

The previous prime is 20378940604411. The next prime is 20378940604427. The reversal of 20378940604416 is 61440604987302.

The square root of 20378940604416 is 4514304.

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

20378940604416 is a `hidden beast` number, since 20 + 3 + 7 + 8 + 9 + 4 + 0 + 604 + 4 + 1 + 6 = 666.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20378940604411) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6933969475 + ... + 6933972413.

Almost surely, 2^{20378940604416} is an apocalyptic number.

20378940604416 is the 4514304-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20378940604416

20378940604416 is an abundant number, since it is smaller than the sum of its proper divisors (38513480433775).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20378940604416 is an frugal number, since it uses more digits than its factorization.

20378940604416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5920 (or 2944 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 20378940604416 in words is "twenty trillion, three hundred seventy-eight billion, nine hundred forty million, six hundred four thousand, four hundred sixteen".