21353007263 has 8 divisors (see below), whose sum is σ = 24416480928. Its totient is φ = 18292794624.

The previous prime is 21353007259. The next prime is 21353007281. The reversal of 21353007263 is 36270035312.

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 21353007263 - 2² = 21353007259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21353007293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801206 + ... + 827427.

It is an arithmetic number, because the mean of its divisors is an integer number (3052060116).

Almost surely, 2^21353007263 is an apocalyptic number.

21353007263 is a deficient number, since it is larger than the sum of its proper divisors (3063473665).

21353007263 is a wasteful number, since it uses less digits than its factorization.

21353007263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630513.

The product of its (nonzero) digits is 22680, while the sum is 32.

The spelling of 21353007263 in words is "twenty-one billion, three hundred fifty-three million, seven thousand, two hundred sixty-three".