21430635453 has 16 divisors (see below), whose sum is σ = 32487442240. Its totient is φ = 13954831632.

The previous prime is 21430635437. The next prime is 21430635461. The reversal of 21430635453 is 35453603412.

21430635453 is a `hidden beast` number, since 2 + 14 + 3 + 0 + 635 + 4 + 5 + 3 = 666.

It is not a de Polignac number, because 21430635453 - 2⁴ = 21430635437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21430635463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9228226 + ... + 9230547.

It is an arithmetic number, because the mean of its divisors is an integer number (2030465140).

Almost surely, 2^21430635453 is an apocalyptic number.

It is an amenable number.

21430635453 is a deficient number, since it is larger than the sum of its proper divisors (11056806787).

21430635453 is a wasteful number, since it uses less digits than its factorization.

21430635453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18458825 (or 18458819 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The spelling of 21430635453 in words is "twenty-one billion, four hundred thirty million, six hundred thirty-five thousand, four hundred fifty-three".