21667103499 has 16 divisors (see below), whose sum is σ = 29639111040. Its totient is φ = 14070987840.

The previous prime is 21667103453. The next prime is 21667103519. The reversal of 21667103499 is 99430176612.

It is not a de Polignac number, because 21667103499 - 2⁸ = 21667103243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21667103429) 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, 52597 + ... + 214710.

It is an arithmetic number, because the mean of its divisors is an integer number (1852444440).

Almost surely, 2^21667103499 is an apocalyptic number.

21667103499 is a deficient number, since it is larger than the sum of its proper divisors (7972007541).

21667103499 is a wasteful number, since it uses less digits than its factorization.

21667103499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268010.

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 21667103499 in words is "twenty-one billion, six hundred sixty-seven million, one hundred three thousand, four hundred ninety-nine".