21430409235 has 32 divisors (see below), whose sum is σ = 34691353920. Its totient is φ = 11295449088.

The previous prime is 21430409233. The next prime is 21430409239. The reversal of 21430409235 is 53290403412.

It is not a de Polignac number, because 21430409235 - 2¹ = 21430409233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21430409196 and 21430409205.

It is not an unprimeable number, because it can be changed into a prime (21430409233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4746339 + ... + 4750851.

It is an arithmetic number, because the mean of its divisors is an integer number (1084104810).

Almost surely, 2^21430409235 is an apocalyptic number.

21430409235 is a deficient number, since it is larger than the sum of its proper divisors (13260944685).

21430409235 is a wasteful number, since it uses less digits than its factorization.

21430409235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8167.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 21430409235 in words is "twenty-one billion, four hundred thirty million, four hundred nine thousand, two hundred thirty-five".