21430286791039 has 4 divisors (see below), whose sum is σ = 24491756332624. Its totient is φ = 18368817249456.

The previous prime is 21430286791009. The next prime is 21430286791061. The reversal of 21430286791039 is 93019768203412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21430286791039 - 2⁹ = 21430286790527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21430286791009) 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, 1530734770782 + ... + 1530734770795.

It is an arithmetic number, because the mean of its divisors is an integer number (6122939083156).

Almost surely, 2^{21430286791039} is an apocalyptic number.

21430286791039 is a deficient number, since it is larger than the sum of its proper divisors (3061469541585).

21430286791039 is an equidigital number, since it uses as much as digits as its factorization.

21430286791039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061469541584.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 21430286791039 in words is "twenty-one trillion, four hundred thirty billion, two hundred eighty-six million, seven hundred ninety-one thousand, thirty-nine".