20761957116672 has 144 divisors (see below), whose sum is σ = 58176195221760. Its totient is φ = 6555185197056.

The previous prime is 20761957116671. The next prime is 20761957116689. The reversal of 20761957116672 is 27661175916702.

It is not an unprimeable number, because it can be changed into a prime (20761957116671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79790493 + ... + 80050275.

Almost surely, 2^{20761957116672} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20761957116672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29088097610880).

20761957116672 is an abundant number, since it is smaller than the sum of its proper divisors (37414238105088).

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

20761957116672 is a wasteful number, since it uses less digits than its factorization.

20761957116672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265298 (or 265284 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 60.

The spelling of 20761957116672 in words is "twenty trillion, seven hundred sixty-one billion, nine hundred fifty-seven million, one hundred sixteen thousand, six hundred seventy-two".