20060730 has 64 divisors (see below), whose sum is σ = 53913600. Its totient is φ = 5307840.

The previous prime is 20060717. The next prime is 20060737. The reversal of 20060730 is 3706002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20060737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51376 + ... + 51764.

It is an arithmetic number, because the mean of its divisors is an integer number (842400).

Almost surely, 2^20060730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20060730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26956800).

20060730 is an abundant number, since it is smaller than the sum of its proper divisors (33852870).

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

20060730 is a wasteful number, since it uses less digits than its factorization.

20060730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 20060730 is about 4478.9206289016. The cubic root of 20060730 is about 271.7162283437.

Adding to 20060730 its reverse (3706002), we get a palindrome (23766732).

The spelling of 20060730 in words is "twenty million, sixty thousand, seven hundred thirty".