20734816 has 12 divisors (see below), whose sum is σ = 40821732. Its totient is φ = 10367392.

The previous prime is 20734801. The next prime is 20734829. The reversal of 20734816 is 61843702.

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 as a sum of consecutive naturals, namely, 323950 + ... + 324013.

It is an arithmetic number, because the mean of its divisors is an integer number (3401811).

Almost surely, 2^20734816 is an apocalyptic number.

It is an amenable number.

20734816 is a deficient number, since it is larger than the sum of its proper divisors (20086916).

20734816 is an equidigital number, since it uses as much as digits as its factorization.

20734816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647973 (or 647965 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20734816 is about 4553.5498240384. The cubic root of 20734816 is about 274.7261891717.

It can be divided in two parts, 2073 and 4816, that added together give a square (6889 = 83²).

The spelling of 20734816 in words is "twenty million, seven hundred thirty-four thousand, eight hundred sixteen".