21190328 has 16 divisors (see below), whose sum is σ = 40236000. Its totient is φ = 10460736.

The previous prime is 21190327. The next prime is 21190343. The reversal of 21190328 is 82309112.

It is a junction number, because it is equal to n+sod(n) for n = 21190297 and 21190306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21190327) 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, 16133 + ... + 17396.

It is an arithmetic number, because the mean of its divisors is an integer number (2514750).

Almost surely, 2^21190328 is an apocalyptic number.

It is an amenable number.

21190328 is a deficient number, since it is larger than the sum of its proper divisors (19045672).

21190328 is a wasteful number, since it uses less digits than its factorization.

21190328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33614 (or 33610 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 21190328 is about 4603.2953413832. The cubic root of 21190328 is about 276.7234050825.

The spelling of 21190328 in words is "twenty-one million, one hundred ninety thousand, three hundred twenty-eight".