21892106 has 8 divisors (see below), whose sum is σ = 32900484. Its totient is φ = 10925280.

The previous prime is 21892099. The next prime is 21892109. The reversal of 21892106 is 60129812.

It can be written as a sum of positive squares in 2 ways, for example, as 21855625 + 36481 = 4675^2 + 191^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21892109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9035 + ... + 11198.

Almost surely, 2^21892106 is an apocalyptic number.

21892106 is a deficient number, since it is larger than the sum of its proper divisors (11008378).

21892106 is a wasteful number, since it uses less digits than its factorization.

21892106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20776.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 21892106 is about 4678.9000844216. The cubic root of 21892106 is about 279.7451166902.

The spelling of 21892106 in words is "twenty-one million, eight hundred ninety-two thousand, one hundred six".