21533745303 has 12 divisors (see below), whose sum is σ = 35547770128. Its totient is φ = 12304997280.

The previous prime is 21533745301. The next prime is 21533745319. The reversal of 21533745303 is 30354733512.

21533745303 is a `hidden beast` number, since 2 + 1 + 53 + 3 + 74 + 530 + 3 = 666.

It is not a de Polignac number, because 21533745303 - 2¹ = 21533745301 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 (21533745301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170902678 + ... + 170902803.

Almost surely, 2^21533745303 is an apocalyptic number.

21533745303 is a deficient number, since it is larger than the sum of its proper divisors (14014024825).

21533745303 is a wasteful number, since it uses less digits than its factorization.

21533745303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341805494 (or 341805491 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 36.

The spelling of 21533745303 in words is "twenty-one billion, five hundred thirty-three million, seven hundred forty-five thousand, three hundred three".