21534045431303 has 8 divisors (see below), whose sum is σ = 21579875884800. Its totient is φ = 21488232213760.

The previous prime is 21534045431299. The next prime is 21534045431321. The reversal of 21534045431303 is 30313454043512.

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

It is a cyclic number.

It is not a de Polignac number, because 21534045431303 - 2² = 21534045431299 is a prime.

It is a super-2 number, since 2×21534045431303² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534045431903) 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, 1806050 + ... + 6806607.

It is an arithmetic number, because the mean of its divisors is an integer number (2697484485600).

Almost surely, 2^{21534045431303} is an apocalyptic number.

21534045431303 is a deficient number, since it is larger than the sum of its proper divisors (45830453497).

21534045431303 is an equidigital number, since it uses as much as digits as its factorization.

21534045431303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8617977.

The product of its (nonzero) digits is 259200, while the sum is 38.

Adding to 21534045431303 its reverse (30313454043512), we get a palindrome (51847499474815).

The spelling of 21534045431303 in words is "twenty-one trillion, five hundred thirty-four billion, forty-five million, four hundred thirty-one thousand, three hundred three".