21333100023 has 6 divisors (see below), whose sum is σ = 30814477824. Its totient is φ = 14222066676.

The previous prime is 21333099971. The next prime is 21333100037. The reversal of 21333100023 is 32000133312.

It is not a de Polignac number, because 21333100023 - 2³³ = 12743165431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21333099969 and 21333100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333100123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1185172215 + ... + 1185172232.

It is an arithmetic number, because the mean of its divisors is an integer number (5135746304).

Almost surely, 2^21333100023 is an apocalyptic number.

21333100023 is a deficient number, since it is larger than the sum of its proper divisors (9481377801).

21333100023 is a wasteful number, since it uses less digits than its factorization.

21333100023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370344453 (or 2370344450 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21333100023 its reverse (32000133312), we get a palindrome (53333233335).

The spelling of 21333100023 in words is "twenty-one billion, three hundred thirty-three million, one hundred thousand, twenty-three".