21430409233 has 2 divisors, whose sum is σ = 21430409234. Its totient is φ = 21430409232.

The previous prime is 21430409227. The next prime is 21430409239. The reversal of 21430409233 is 33290403412.

It is a balanced prime because it is at equal distance from previous prime (21430409227) and next prime (21430409239).

It can be written as a sum of positive squares in only one way, i.e., 12066363409 + 9364045824 = 109847^2 + 96768^2 .

It is a cyclic number.

It is not a de Polignac number, because 21430409233 - 2⁵ = 21430409201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21430409195 and 21430409204.

It is not a weakly prime, because it can be changed into another prime (21430409239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715204616 + 10715204617.

It is an arithmetic number, because the mean of its divisors is an integer number (10715204617).

Almost surely, 2^21430409233 is an apocalyptic number.

It is an amenable number.

21430409233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430409233 is an equidigital number, since it uses as much as digits as its factorization.

21430409233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 21430409233 in words is "twenty-one billion, four hundred thirty million, four hundred nine thousand, two hundred thirty-three".