20923796 has 18 divisors (see below), whose sum is σ = 37642878. Its totient is φ = 10176480.

The previous prime is 20923741. The next prime is 20923801. The reversal of 20923796 is 69732902.

It can be written as a sum of positive squares in 3 ways, for example, as 16240900 + 4682896 = 4030^2 + 2164^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3566 + ... + 7386.

It is an arithmetic number, because the mean of its divisors is an integer number (2091271).

Almost surely, 2^20923796 is an apocalyptic number.

It is an amenable number.

20923796 is a deficient number, since it is larger than the sum of its proper divisors (16719082).

20923796 is a wasteful number, since it uses less digits than its factorization.

20923796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899 (or 3860 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 20923796 is about 4574.2536003156. The cubic root of 20923796 is about 275.5582971988.

The spelling of 20923796 in words is "twenty million, nine hundred twenty-three thousand, seven hundred ninety-six".