20724316 has 6 divisors (see below), whose sum is σ = 36267560. Its totient is φ = 10362156.

The previous prime is 20724287. The next prime is 20724349. The reversal of 20724316 is 61342702.

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 as a sum of consecutive naturals, namely, 2590536 + ... + 2590543.

Almost surely, 2^20724316 is an apocalyptic number.

It is an amenable number.

20724316 is a deficient number, since it is larger than the sum of its proper divisors (15543244).

20724316 is a wasteful number, since it uses less digits than its factorization.

20724316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5181083 (or 5181081 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20724316 is about 4552.3967313933. The cubic root of 20724316 is about 274.6798080505.

The spelling of 20724316 in words is "twenty million, seven hundred twenty-four thousand, three hundred sixteen".