20730472 has 32 divisors (see below), whose sum is σ = 45460800. Its totient is φ = 8676864.

The previous prime is 20730439. The next prime is 20730481. The reversal of 20730472 is 27403702.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1897 + ... + 6712.

It is an arithmetic number, because the mean of its divisors is an integer number (1420650).

Almost surely, 2^20730472 is an apocalyptic number.

It is an amenable number.

20730472 is an abundant number, since it is smaller than the sum of its proper divisors (24730328).

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

20730472 is a wasteful number, since it uses less digits than its factorization.

20730472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8665 (or 8661 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20730472 is about 4553.0728085547. The cubic root of 20730472 is about 274.7070025386.

The spelling of 20730472 in words is "twenty million, seven hundred thirty thousand, four hundred seventy-two".