21303402115 has 8 divisors (see below), whose sum is σ = 25564962960. Its totient is φ = 17042134752.

The previous prime is 21303402103. The next prime is 21303402121. The reversal of 21303402115 is 51120430312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21303402115 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 145912 + ... + 252778.

It is an arithmetic number, because the mean of its divisors is an integer number (3195620370).

Almost surely, 2^21303402115 is an apocalyptic number.

21303402115 is a deficient number, since it is larger than the sum of its proper divisors (4261560845).

21303402115 is a wasteful number, since it uses less digits than its factorization.

21303402115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146741.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21303402115 its reverse (51120430312), we get a palindrome (72423832427).

The spelling of 21303402115 in words is "twenty-one billion, three hundred three million, four hundred two thousand, one hundred fifteen".