21648747240103 has 2 divisors, whose sum is σ = 21648747240104. Its totient is φ = 21648747240102.

The previous prime is 21648747240097. The next prime is 21648747240137. The reversal of 21648747240103 is 30104274784612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21648747240103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21648747240143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10824373620051 + 10824373620052.

It is an arithmetic number, because the mean of its divisors is an integer number (10824373620052).

Almost surely, 2^{21648747240103} is an apocalyptic number.

21648747240103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21648747240103 is an equidigital number, since it uses as much as digits as its factorization.

21648747240103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1806336, while the sum is 49.

The spelling of 21648747240103 in words is "twenty-one trillion, six hundred forty-eight billion, seven hundred forty-seven million, two hundred forty thousand, one hundred three".