21546106 has 12 divisors (see below), whose sum is σ = 34333038. Its totient is φ = 10139072.

The previous prime is 21546079. The next prime is 21546149. The reversal of 21546106 is 60164512.

It can be written as a sum of positive squares in 3 ways, for example, as 17098225 + 4447881 = 4135^2 + 2109^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18061 + ... + 19216.

Almost surely, 2^21546106 is an apocalyptic number.

21546106 is a deficient number, since it is larger than the sum of its proper divisors (12786932).

21546106 is a wasteful number, since it uses less digits than its factorization.

21546106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37313 (or 37296 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 21546106 is about 4641.7783230137. The cubic root of 21546106 is about 278.2635132300.

The spelling of 21546106 in words is "twenty-one million, five hundred forty-six thousand, one hundred six".