21107353503 has 8 divisors (see below), whose sum is σ = 28148276016. Its totient is φ = 14069000000.

The previous prime is 21107353489. The next prime is 21107353523. The reversal of 21107353503 is 30535370112.

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 21107353503 - 2⁵ = 21107353471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21107353523) 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, 622998 + ... + 656003.

It is an arithmetic number, because the mean of its divisors is an integer number (3518534502).

Almost surely, 2^21107353503 is an apocalyptic number.

21107353503 is a deficient number, since it is larger than the sum of its proper divisors (7040922513).

21107353503 is a wasteful number, since it uses less digits than its factorization.

21107353503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284505.

The product of its (nonzero) digits is 9450, while the sum is 30.

The spelling of 21107353503 in words is "twenty-one billion, one hundred seven million, three hundred fifty-three thousand, five hundred three".