21343116515 has 16 divisors (see below), whose sum is σ = 30279890880. Its totient is φ = 14130614400.

The previous prime is 21343116511. The next prime is 21343116523. The reversal of 21343116515 is 51561134312.

It is not a de Polignac number, because 21343116515 - 2² = 21343116511 is a prime.

It is a super-3 number, since 3×21343116515³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21343116511) 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, 10512836 + ... + 10514865.

It is an arithmetic number, because the mean of its divisors is an integer number (1892493180).

Almost surely, 2^21343116515 is an apocalyptic number.

21343116515 is a deficient number, since it is larger than the sum of its proper divisors (8936774365).

21343116515 is a wasteful number, since it uses less digits than its factorization.

21343116515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21027742.

The product of its digits is 10800, while the sum is 32.

The spelling of 21343116515 in words is "twenty-one billion, three hundred forty-three million, one hundred sixteen thousand, five hundred fifteen".