20676139264 has 243 divisors, whose sum is σ = 49017158379. Its totient is φ = 8696540160.

The previous prime is 20676139249. The next prime is 20676139303. The reversal of 20676139264 is 46293167602.

The square root of 20676139264 is 143792.

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

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 480840427 + ... + 480840469.

Almost surely, 2^20676139264 is an apocalyptic number.

20676139264 is the 143792-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20676139264

20676139264 is an abundant number, since it is smaller than the sum of its proper divisors (28341019115).

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

20676139264 is an equidigital number, since it uses as much as digits as its factorization.

20676139264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 20676139264 in words is "twenty billion, six hundred seventy-six million, one hundred thirty-nine thousand, two hundred sixty-four".