20730285312 has 432 divisors, whose sum is σ = 65244480000. Its totient is φ = 5821009920.

The previous prime is 20730285263. The next prime is 20730285353. The reversal of 20730285312 is 21358203702.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104172189 + ... + 104172387.

Almost surely, 2^20730285312 is an apocalyptic number.

20730285312 is a gapful number since it is divisible by the number (22) 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 20730285312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32622240000).

20730285312 is an abundant number, since it is smaller than the sum of its proper divisors (44514194688).

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

20730285312 is a wasteful number, since it uses less digits than its factorization.

20730285312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 20730285312 in words is "twenty billion, seven hundred thirty million, two hundred eighty-five thousand, three hundred twelve".