20663330688 has 960 divisors, whose sum is σ = 83650126560. Its totient is φ = 4926873600.

The previous prime is 20663330671. The next prime is 20663330693. The reversal of 20663330688 is 88603336602.

20663330688 is a `hidden beast` number, since 2 + 0 + 6 + 633 + 3 + 0 + 6 + 8 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 114161958 + ... + 114162138.

Almost surely, 2^20663330688 is an apocalyptic number.

20663330688 is a gapful number since it is divisible by the number (28) 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 20663330688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41825063280).

20663330688 is an abundant number, since it is smaller than the sum of its proper divisors (62986795872).

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

20663330688 is a wasteful number, since it uses less digits than its factorization.

20663330688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 20663330688 in words is "twenty billion, six hundred sixty-three million, three hundred thirty thousand, six hundred eighty-eight".