21792103 has 2 divisors, whose sum is σ = 21792104. Its totient is φ = 21792102.

The previous prime is 21792091. The next prime is 21792119. The reversal of 21792103 is 30129712.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21792103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21792143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10896051 + 10896052.

It is an arithmetic number, because the mean of its divisors is an integer number (10896052).

Almost surely, 2^21792103 is an apocalyptic number.

21792103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21792103 is an equidigital number, since it uses as much as digits as its factorization.

21792103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 21792103 is about 4668.2012595860. The cubic root of 21792103 is about 279.3185084810.

The spelling of 21792103 in words is "twenty-one million, seven hundred ninety-two thousand, one hundred three".