21401330423 has 8 divisors (see below), whose sum is σ = 23349916416. Its totient is φ = 19453246200.

The previous prime is 21401330383. The next prime is 21401330449. The reversal of 21401330423 is 32403310412.

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 21401330423 - 2⁶ = 21401330359 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 (21401330473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33311 + ... + 209552.

It is an arithmetic number, because the mean of its divisors is an integer number (2918739552).

Almost surely, 2^21401330423 is an apocalyptic number.

21401330423 is a deficient number, since it is larger than the sum of its proper divisors (1948585993).

21401330423 is a wasteful number, since it uses less digits than its factorization.

21401330423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250885.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21401330423 its reverse (32403310412), we get a palindrome (53804640835).

The spelling of 21401330423 in words is "twenty-one billion, four hundred one million, three hundred thirty thousand, four hundred twenty-three".