20730464 has 24 divisors (see below), whose sum is σ = 41142528. Its totient is φ = 10281600.

The previous prime is 20730439. The next prime is 20730481. The reversal of 20730464 is 46403702.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1514 + ... + 6614.

It is an arithmetic number, because the mean of its divisors is an integer number (1714272).

Almost surely, 2^20730464 is an apocalyptic number.

It is an amenable number.

20730464 is a deficient number, since it is larger than the sum of its proper divisors (20412064).

20730464 is a wasteful number, since it uses less digits than its factorization.

20730464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5238 (or 5230 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20730464 is about 4553.0719300270. The cubic root of 20730464 is about 274.7069672017.

The spelling of 20730464 in words is "twenty million, seven hundred thirty thousand, four hundred sixty-four".