21016358 has 16 divisors (see below), whose sum is σ = 35577360. Its totient is φ = 9223200.

The previous prime is 21016309. The next prime is 21016381. The reversal of 21016358 is 85361012.

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 7 ways as a sum of consecutive naturals, for example, 15833 + ... + 17108.

It is an arithmetic number, because the mean of its divisors is an integer number (2223585).

Almost surely, 2^21016358 is an apocalyptic number.

21016358 is a deficient number, since it is larger than the sum of its proper divisors (14561002).

21016358 is a wasteful number, since it uses less digits than its factorization.

21016358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32983.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 21016358 is about 4584.3601516460. The cubic root of 21016358 is about 275.9640347311.

The spelling of 21016358 in words is "twenty-one million, sixteen thousand, three hundred fifty-eight".