21460233785 has 8 divisors (see below), whose sum is σ = 25784117640. Its totient is φ = 17146962304.

The previous prime is 21460233671. The next prime is 21460233787. The reversal of 21460233785 is 58733206412.

It can be written as a sum of positive squares in 4 ways, for example, as 11806778281 + 9653455504 = 108659^2 + 98252^2 .

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 21460233785 - 2²⁴ = 21443456569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21460233787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2648642 + ... + 2656731.

It is an arithmetic number, because the mean of its divisors is an integer number (3223014705).

Almost surely, 2^21460233785 is an apocalyptic number.

It is an amenable number.

21460233785 is a deficient number, since it is larger than the sum of its proper divisors (4323883855).

21460233785 is an equidigital number, since it uses as much as digits as its factorization.

21460233785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306187.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 21460233785 in words is "twenty-one billion, four hundred sixty million, two hundred thirty-three thousand, seven hundred eighty-five".