20730450 has 48 divisors (see below), whose sum is σ = 55371456. Its totient is φ = 5102400.

The previous prime is 20730439. The next prime is 20730481. The reversal of 20730450 is 5403702.

It is a happy number.

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 23 ways as a sum of consecutive naturals, for example, 3366 + ... + 7265.

It is an arithmetic number, because the mean of its divisors is an integer number (1153572).

Almost surely, 2^20730450 is an apocalyptic number.

20730450 is an abundant number, since it is smaller than the sum of its proper divisors (34641006).

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

20730450 is a wasteful number, since it uses less digits than its factorization.

20730450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10659 (or 10654 counting only the distinct ones).

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

The square root of 20730450 is about 4553.0703926032. The cubic root of 20730450 is about 274.7069053620.

The spelling of 20730450 in words is "twenty million, seven hundred thirty thousand, four hundred fifty".