16620724 has 12 divisors (see below), whose sum is σ = 29122884. Its totient is φ = 8299904.

The previous prime is 16620707. The next prime is 16620727. The reversal of 16620724 is 42702661.

It can be written as a sum of positive squares in 2 ways, for example, as 8892324 + 7728400 = 2982^2 + 2780^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16620692 and 16620701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16620727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1782 + ... + 6034.

It is an arithmetic number, because the mean of its divisors is an integer number (2426907).

Almost surely, 2^16620724 is an apocalyptic number.

It is an amenable number.

16620724 is a deficient number, since it is larger than the sum of its proper divisors (12502160).

16620724 is a wasteful number, since it uses less digits than its factorization.

16620724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234 (or 5232 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 16620724 is about 4076.8522170910. The cubic root of 16620724 is about 255.2015528120.

The spelling of 16620724 in words is "sixteen million, six hundred twenty thousand, seven hundred twenty-four".