21903869343 has 16 divisors (see below), whose sum is σ = 29366323200. Its totient is φ = 14522049024.

The previous prime is 21903869321. The next prime is 21903869369. The reversal of 21903869343 is 34396830912.

It is a happy number.

It is not a de Polignac number, because 21903869343 - 2⁵ = 21903869311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21903869292 and 21903869301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21903869303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2774680 + ... + 2782562.

It is an arithmetic number, because the mean of its divisors is an integer number (1835395200).

Almost surely, 2^21903869343 is an apocalyptic number.

21903869343 is a deficient number, since it is larger than the sum of its proper divisors (7462453857).

21903869343 is a wasteful number, since it uses less digits than its factorization.

21903869343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12878.

The product of its (nonzero) digits is 839808, while the sum is 48.

The spelling of 21903869343 in words is "twenty-one billion, nine hundred three million, eight hundred sixty-nine thousand, three hundred forty-three".