21793000 has 128 divisors (see below), whose sum is σ = 56908800. Its totient is φ = 7776000.

The previous prime is 21792989. The next prime is 21793021. The reversal of 21793000 is 39712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 588982 + ... + 589018.

It is an arithmetic number, because the mean of its divisors is an integer number (444600).

Almost surely, 2^21793000 is an apocalyptic number.

21793000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21793000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28454400).

21793000 is an abundant number, since it is smaller than the sum of its proper divisors (35115800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21793000 is a wasteful number, since it uses less digits than its factorization.

21793000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 21793000 is about 4668.2973341466. The cubic root of 21793000 is about 279.3223408366.

The spelling of 21793000 in words is "twenty-one million, seven hundred ninety-three thousand".