21523074303 has 8 divisors (see below), whose sum is σ = 28702983600. Its totient is φ = 14345940608.

The previous prime is 21523074301. The next prime is 21523074311. The reversal of 21523074303 is 30347032512.

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 21523074303 - 2¹ = 21523074301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21523074301) 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, 675738 + ... + 706871.

It is an arithmetic number, because the mean of its divisors is an integer number (3587872950).

Almost surely, 2^21523074303 is an apocalyptic number.

21523074303 is a deficient number, since it is larger than the sum of its proper divisors (7179909297).

21523074303 is a wasteful number, since it uses less digits than its factorization.

21523074303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387801.

The product of its (nonzero) digits is 15120, while the sum is 30.

The spelling of 21523074303 in words is "twenty-one billion, five hundred twenty-three million, seventy-four thousand, three hundred three".