21792300 has 72 divisors (see below), whose sum is σ = 66776976. Its totient is φ = 5468160.

The previous prime is 21792289. The next prime is 21792301. The reversal of 21792300 is 329712.

It is not an unprimeable number, because it can be changed into a prime (21792301) 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, 2964 + ... + 7236.

It is an arithmetic number, because the mean of its divisors is an integer number (927458).

Almost surely, 2^21792300 is an apocalyptic number.

21792300 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 21792300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33388488).

21792300 is an abundant number, since it is smaller than the sum of its proper divisors (44984676).

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

21792300 is a wasteful number, since it uses less digits than its factorization.

21792300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307 (or 4300 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 21792300 is about 4668.2223597425. Note that the first 3 decimals coincide. The cubic root of 21792300 is about 279.3193501556.

The spelling of 21792300 in words is "twenty-one million, seven hundred ninety-two thousand, three hundred".