21792101 has 8 divisors (see below), whose sum is σ = 22814208. Its totient is φ = 20790000.

The previous prime is 21792091. The next prime is 21792103. The reversal of 21792101 is 10129712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21792101 - 2¹⁸ = 21529957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21792103) by changing a digit.

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, 2750 + ... + 7151.

It is an arithmetic number, because the mean of its divisors is an integer number (2851776).

Almost surely, 2^21792101 is an apocalyptic number.

It is an amenable number.

21792101 is a deficient number, since it is larger than the sum of its proper divisors (1022107).

21792101 is an equidigital number, since it uses as much as digits as its factorization.

21792101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10003.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 21792101 is about 4668.2010453707. The cubic root of 21792101 is about 279.3184999360.

The spelling of 21792101 in words is "twenty-one million, seven hundred ninety-two thousand, one hundred one".