21433401134203 has 4 divisors (see below), whose sum is σ = 21434330901808. Its totient is φ = 21432471366600.

The previous prime is 21433401134183. The next prime is 21433401134207. The reversal of 21433401134203 is 30243110433412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21433401134203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21433401134207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464849223 + ... + 464895328.

It is an arithmetic number, because the mean of its divisors is an integer number (5358582725452).

Almost surely, 2^{21433401134203} is an apocalyptic number.

21433401134203 is a deficient number, since it is larger than the sum of its proper divisors (929767605).

21433401134203 is an equidigital number, since it uses as much as digits as its factorization.

21433401134203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929767604.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 21433401134203 its reverse (30243110433412), we get a palindrome (51676511567615).

The spelling of 21433401134203 in words is "twenty-one trillion, four hundred thirty-three billion, four hundred one million, one hundred thirty-four thousand, two hundred three".