21423034023 has 8 divisors (see below), whose sum is σ = 28565402736. Its totient is φ = 14281344000.

The previous prime is 21423033977. The next prime is 21423034067. The reversal of 21423034023 is 32043032412.

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

It is not a de Polignac number, because 21423034023 - 2¹³ = 21423025831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21423033984 and 21423034002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21423034093) 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, 90778 + ... + 226023.

It is an arithmetic number, because the mean of its divisors is an integer number (3570675342).

Almost surely, 2^21423034023 is an apocalyptic number.

21423034023 is a deficient number, since it is larger than the sum of its proper divisors (7142368713).

21423034023 is a wasteful number, since it uses less digits than its factorization.

21423034023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339345.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21423034023 its reverse (32043032412), we get a palindrome (53466066435).

The spelling of 21423034023 in words is "twenty-one billion, four hundred twenty-three million, thirty-four thousand, twenty-three".