21652642103 has 2 divisors, whose sum is σ = 21652642104. Its totient is φ = 21652642102.

The previous prime is 21652642073. The next prime is 21652642139. The reversal of 21652642103 is 30124625612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21652642103 - 2¹⁰ = 21652641079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21652642103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21652642163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10826321051 + 10826321052.

It is an arithmetic number, because the mean of its divisors is an integer number (10826321052).

Almost surely, 2^21652642103 is an apocalyptic number.

21652642103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21652642103 is an equidigital number, since it uses as much as digits as its factorization.

21652642103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 21652642103 in words is "twenty-one billion, six hundred fifty-two million, six hundred forty-two thousand, one hundred three".