20730522 has 8 divisors (see below), whose sum is σ = 41461056. Its totient is φ = 6910172.

The previous prime is 20730491. The next prime is 20730529. The reversal of 20730522 is 22503702.

It is a sphenic number, since it is the product of 3 distinct primes.

20730522 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20730529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1727538 + ... + 1727549.

It is an arithmetic number, because the mean of its divisors is an integer number (5182632).

Almost surely, 2^20730522 is an apocalyptic number.

20730522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20730522 is a wasteful number, since it uses less digits than its factorization.

20730522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455092.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 20730522 is about 4553.0782993487. The cubic root of 20730522 is about 274.7072233945.

The spelling of 20730522 in words is "twenty million, seven hundred thirty thousand, five hundred twenty-two".