21433354103 has 32 divisors (see below), whose sum is σ = 25858406400. Its totient is φ = 17368940160.

The previous prime is 21433354087. The next prime is 21433354123. The reversal of 21433354103 is 30145333412.

It is a cyclic number.

It is not a de Polignac number, because 21433354103 - 2⁴ = 21433354087 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 (21433354123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5027993 + ... + 5032253.

It is an arithmetic number, because the mean of its divisors is an integer number (808075200).

Almost surely, 2^21433354103 is an apocalyptic number.

21433354103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21433354103 is a deficient number, since it is larger than the sum of its proper divisors (4425052297).

21433354103 is a wasteful number, since it uses less digits than its factorization.

21433354103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4647.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 21433354103 its reverse (30145333412), we get a palindrome (51578687515).

The spelling of 21433354103 in words is "twenty-one billion, four hundred thirty-three million, three hundred fifty-four thousand, one hundred three".