20723796 has 48 divisors (see below), whose sum is σ = 53988480. Its totient is φ = 6874560.

The previous prime is 20723783. The next prime is 20723803. The reversal of 20723796 is 69732702.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20723796.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 33280 + ... + 33896.

It is an arithmetic number, because the mean of its divisors is an integer number (1124760).

Almost surely, 2^20723796 is an apocalyptic number.

It is an amenable number.

20723796 is an abundant number, since it is smaller than the sum of its proper divisors (33264684).

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

20723796 is a wasteful number, since it uses less digits than its factorization.

20723796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 20723796 is about 4552.3396182622. The cubic root of 20723796 is about 274.6775106736.

The spelling of 20723796 in words is "twenty million, seven hundred twenty-three thousand, seven hundred ninety-six".