21016359 has 48 divisors (see below), whose sum is σ = 38019072. Its totient is φ = 10891584.

The previous prime is 21016309. The next prime is 21016381. The reversal of 21016359 is 95361012.

21016359 is a `hidden beast` number, since 21 + 0 + 1 + 635 + 9 = 666.

It is not a de Polignac number, because 21016359 - 2⁸ = 21016103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21016309) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54682 + ... + 55064.

It is an arithmetic number, because the mean of its divisors is an integer number (792064).

Almost surely, 2^21016359 is an apocalyptic number.

21016359 is a deficient number, since it is larger than the sum of its proper divisors (17002713).

21016359 is a wasteful number, since it uses less digits than its factorization.

21016359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 21016359 is about 4584.3602607125. The cubic root of 21016359 is about 275.9640391081.

The spelling of 21016359 in words is "twenty-one million, sixteen thousand, three hundred fifty-nine".