21082694423 has 16 divisors (see below), whose sum is σ = 24401399040. Its totient is φ = 17841316416.

The previous prime is 21082694407. The next prime is 21082694429. The reversal of 21082694423 is 32449628012.

It is not a de Polignac number, because 21082694423 - 2⁴ = 21082694407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21082694429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400736 + ... + 450282.

It is an arithmetic number, because the mean of its divisors is an integer number (1525087440).

Almost surely, 2^21082694423 is an apocalyptic number.

21082694423 is a deficient number, since it is larger than the sum of its proper divisors (3318704617).

21082694423 is an equidigital number, since it uses as much as digits as its factorization.

21082694423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50326.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 21082694423 in words is "twenty-one billion, eighty-two million, six hundred ninety-four thousand, four hundred twenty-three".