16350021 has 24 divisors (see below), whose sum is σ = 24635520. Its totient is φ = 10440000.

The previous prime is 16350011. The next prime is 16350043. The reversal of 16350021 is 12005361.

16350021 is a `hidden beast` number, since 163 + 500 + 2 + 1 = 666.

It is not a de Polignac number, because 16350021 - 2¹¹ = 16347973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16349976 and 16350003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16350001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21396 + ... + 22146.

It is an arithmetic number, because the mean of its divisors is an integer number (1026480).

Almost surely, 2^16350021 is an apocalyptic number.

It is an amenable number.

16350021 is a deficient number, since it is larger than the sum of its proper divisors (8285499).

16350021 is a wasteful number, since it uses less digits than its factorization.

16350021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 16350021 is about 4043.5159205820. The cubic root of 16350021 is about 253.8084663906.

Adding to 16350021 its reverse (12005361), we get a palindrome (28355382).

The spelling of 16350021 in words is "sixteen million, three hundred fifty thousand, twenty-one".