20780924 has 12 divisors (see below), whose sum is σ = 36531264. Its totient is φ = 10343424.

The previous prime is 20780887. The next prime is 20780941. The reversal of 20780924 is 42908702.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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, 10757 + ... + 12540.

It is an arithmetic number, because the mean of its divisors is an integer number (3044272).

Almost surely, 2^20780924 is an apocalyptic number.

It is an amenable number.

20780924 is a deficient number, since it is larger than the sum of its proper divisors (15750340).

20780924 is a wasteful number, since it uses less digits than its factorization.

20780924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23524 (or 23522 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20780924 is about 4558.6098758284. The cubic root of 20780924 is about 274.9296745793.

The spelling of 20780924 in words is "twenty million, seven hundred eighty thousand, nine hundred twenty-four".