21192106 has 16 divisors (see below), whose sum is σ = 36036000. Its totient is φ = 9265968.

The previous prime is 21192091. The next prime is 21192113. The reversal of 21192106 is 60129112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20956 + ... + 21943.

It is an arithmetic number, because the mean of its divisors is an integer number (2252250).

Almost surely, 2^21192106 is an apocalyptic number.

21192106 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21192106 is a deficient number, since it is larger than the sum of its proper divisors (14843894).

21192106 is a wasteful number, since it uses less digits than its factorization.

21192106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42933.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 21192106 is about 4603.4884598530. The cubic root of 21192106 is about 276.7311444696.

It can be divided in two parts, 2119 and 2106, that added together give a square (4225 = 65²).

The spelling of 21192106 in words is "twenty-one million, one hundred ninety-two thousand, one hundred six".