21783532103 has 2 divisors, whose sum is σ = 21783532104. Its totient is φ = 21783532102.

The previous prime is 21783532049. The next prime is 21783532157. The reversal of 21783532103 is 30123538712.

It is a balanced prime because it is at equal distance from previous prime (21783532049) and next prime (21783532157).

It is a cyclic number.

It is not a de Polignac number, because 21783532103 - 2⁶ = 21783532039 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21783532193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10891766051 + 10891766052.

It is an arithmetic number, because the mean of its divisors is an integer number (10891766052).

Almost surely, 2^21783532103 is an apocalyptic number.

21783532103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21783532103 is an equidigital number, since it uses as much as digits as its factorization.

21783532103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 21783532103 in words is "twenty-one billion, seven hundred eighty-three million, five hundred thirty-two thousand, one hundred three".