21352305503 has 2 divisors, whose sum is σ = 21352305504. Its totient is φ = 21352305502.

The previous prime is 21352305467. The next prime is 21352305587. The reversal of 21352305503 is 30550325312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21352305503 - 2¹⁶ = 21352239967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21352305703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10676152751 + 10676152752.

It is an arithmetic number, because the mean of its divisors is an integer number (10676152752).

Almost surely, 2^21352305503 is an apocalyptic number.

21352305503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21352305503 is an equidigital number, since it uses as much as digits as its factorization.

21352305503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 29.

The spelling of 21352305503 in words is "twenty-one billion, three hundred fifty-two million, three hundred five thousand, five hundred three".