20730708 has 48 divisors (see below), whose sum is σ = 55608000. Its totient is φ = 6670944.

The previous prime is 20730623. The next prime is 20730719. The reversal of 20730708 is 80703702.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178 + ... + 6441.

It is an arithmetic number, because the mean of its divisors is an integer number (1158500).

Almost surely, 2^20730708 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 20730708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27804000).

20730708 is an abundant number, since it is smaller than the sum of its proper divisors (34877292).

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

20730708 is a wasteful number, since it uses less digits than its factorization.

20730708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6661 (or 6653 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 20730708 is about 4553.0987250443. The cubic root of 20730708 is about 274.7080449752.

The spelling of 20730708 in words is "twenty million, seven hundred thirty thousand, seven hundred eight".