21099301403 has 4 divisors (see below), whose sum is σ = 21163045848. Its totient is φ = 21035556960.

The previous prime is 21099301397. The next prime is 21099301417. The reversal of 21099301403 is 30410399012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21099301403 - 2¹⁴ = 21099285019 is a prime.

It is a super-3 number, since 3×21099301403³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21099301403.

It is not an unprimeable number, because it can be changed into a prime (21099301453) 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 3 ways as a sum of consecutive naturals, for example, 31871726 + ... + 31872387.

It is an arithmetic number, because the mean of its divisors is an integer number (5290761462).

Almost surely, 2^21099301403 is an apocalyptic number.

21099301403 is a deficient number, since it is larger than the sum of its proper divisors (63744445).

21099301403 is an equidigital number, since it uses as much as digits as its factorization.

21099301403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63744444.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 21099301403 in words is "twenty-one billion, ninety-nine million, three hundred one thousand, four hundred three".