20963647798812 has 240 divisors, whose sum is σ = 57967440263040. Its totient is φ = 6588042657408.

The previous prime is 20963647798789. The next prime is 20963647798813. The reversal of 20963647798812 is 21889774636902.

20963647798812 is a `hidden beast` number, since 2 + 0 + 9 + 63 + 6 + 477 + 9 + 88 + 12 = 666.

It is a super-2 number, since 2×20963647798812² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20963647798813) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1234090983 + ... + 1234107969.

It is an arithmetic number, because the mean of its divisors is an integer number (241531001096).

Almost surely, 2^{20963647798812} 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 20963647798812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28983720131520).

20963647798812 is an abundant number, since it is smaller than the sum of its proper divisors (37003792464228).

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

20963647798812 is a wasteful number, since it uses less digits than its factorization.

20963647798812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17982 (or 17971 counting only the distinct ones).

The product of its (nonzero) digits is 438939648, while the sum is 72.

The spelling of 20963647798812 in words is "twenty trillion, nine hundred sixty-three billion, six hundred forty-seven million, seven hundred ninety-eight thousand, eight hundred twelve".