21352103503 has 2 divisors, whose sum is σ = 21352103504. Its totient is φ = 21352103502.

The previous prime is 21352103471. The next prime is 21352103527. The reversal of 21352103503 is 30530125312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21352103503 - 2⁵ = 21352103471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21352103543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10676051751 + 10676051752.

It is an arithmetic number, because the mean of its divisors is an integer number (10676051752).

Almost surely, 2^21352103503 is an apocalyptic number.

21352103503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21352103503 is an equidigital number, since it uses as much as digits as its factorization.

21352103503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 21352103503 its reverse (30530125312), we get a palindrome (51882228815).

The spelling of 21352103503 in words is "twenty-one billion, three hundred fifty-two million, one hundred three thousand, five hundred three".