21233013423 has 8 divisors (see below), whose sum is σ = 28319982000. Its totient is φ = 14150693568.

The previous prime is 21233013419. The next prime is 21233013443. The reversal of 21233013423 is 32431033212.

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

It is not a de Polignac number, because 21233013423 - 2² = 21233013419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21233013393 and 21233013402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233013443) 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, 1151508 + ... + 1169801.

It is an arithmetic number, because the mean of its divisors is an integer number (3539997750).

Almost surely, 2^21233013423 is an apocalyptic number.

21233013423 is a deficient number, since it is larger than the sum of its proper divisors (7086968577).

21233013423 is a wasteful number, since it uses less digits than its factorization.

21233013423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2324361.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21233013423 its reverse (32431033212), we get a palindrome (53664046635).

The spelling of 21233013423 in words is "twenty-one billion, two hundred thirty-three million, thirteen thousand, four hundred twenty-three".