21230461393 has 8 divisors (see below), whose sum is σ = 21534607296. Its totient is φ = 20926458000.

The previous prime is 21230461391. The next prime is 21230461403. The reversal of 21230461393 is 39316403212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21230461393 - 2¹ = 21230461391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230461391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284943 + ... + 351643.

It is an arithmetic number, because the mean of its divisors is an integer number (2691825912).

Almost surely, 2^21230461393 is an apocalyptic number.

It is an amenable number.

21230461393 is a deficient number, since it is larger than the sum of its proper divisors (304145903).

21230461393 is an equidigital number, since it uses as much as digits as its factorization.

21230461393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71255.

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 21230461393 in words is "twenty-one billion, two hundred thirty million, four hundred sixty-one thousand, three hundred ninety-three".