21435053383 has 2 divisors, whose sum is σ = 21435053384. Its totient is φ = 21435053382.

The previous prime is 21435053317. The next prime is 21435053413. The reversal of 21435053383 is 38335053412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21435053383 - 2²¹ = 21432956231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21435053183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10717526691 + 10717526692.

It is an arithmetic number, because the mean of its divisors is an integer number (10717526692).

Almost surely, 2^21435053383 is an apocalyptic number.

21435053383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21435053383 is an equidigital number, since it uses as much as digits as its factorization.

21435053383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 21435053383 in words is "twenty-one billion, four hundred thirty-five million, fifty-three thousand, three hundred eighty-three".