21270434433 has 4 divisors (see below), whose sum is σ = 28360579248. Its totient is φ = 14180289620.

The previous prime is 21270434399. The next prime is 21270434441. The reversal of 21270434433 is 33443407212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21270434433 - 2¹⁴ = 21270418049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21270434394 and 21270434403.

It is not an unprimeable number, because it can be changed into a prime (21270434483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3545072403 + ... + 3545072408.

It is an arithmetic number, because the mean of its divisors is an integer number (7090144812).

Almost surely, 2^21270434433 is an apocalyptic number.

It is an amenable number.

21270434433 is a deficient number, since it is larger than the sum of its proper divisors (7090144815).

21270434433 is an equidigital number, since it uses as much as digits as its factorization.

21270434433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7090144814.

The product of its (nonzero) digits is 48384, while the sum is 33.

The spelling of 21270434433 in words is "twenty-one billion, two hundred seventy million, four hundred thirty-four thousand, four hundred thirty-three".