20611646304 has 96 divisors (see below), whose sum is σ = 55576160640. Its totient is φ = 6686287872.

The previous prime is 20611646269. The next prime is 20611646309. The reversal of 20611646304 is 40364611602.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×20611646304² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20611646309) 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, 514552 + ... + 553160.

It is an arithmetic number, because the mean of its divisors is an integer number (578918340).

Almost surely, 2^20611646304 is an apocalyptic number.

20611646304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20611646304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27788080320).

20611646304 is an abundant number, since it is smaller than the sum of its proper divisors (34964514336).

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

20611646304 is a wasteful number, since it uses less digits than its factorization.

20611646304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38772 (or 38764 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 20611646304 in words is "twenty billion, six hundred eleven million, six hundred forty-six thousand, three hundred four".