21106926 has 16 divisors (see below), whose sum is σ = 46904400. Its totient is φ = 7035624.

The previous prime is 21106907. The next prime is 21106933. The reversal of 21106926 is 62960112.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 21106926.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195381 + ... + 195488.

It is an arithmetic number, because the mean of its divisors is an integer number (2931525).

Almost surely, 2^21106926 is an apocalyptic number.

21106926 is an abundant number, since it is smaller than the sum of its proper divisors (25797474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21106926 is a wasteful number, since it uses less digits than its factorization.

21106926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390880 (or 390874 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 21106926 is about 4594.2274649826. The cubic root of 21106926 is about 276.3598802596.

The spelling of 21106926 in words is "twenty-one million, one hundred six thousand, nine hundred twenty-six".