21476105 has 16 divisors (see below), whose sum is σ = 29562624. Its totient is φ = 14671680.

The previous prime is 21476053. The next prime is 21476107. The reversal of 21476105 is 50167412.

It is not a de Polignac number, because 21476105 - 2²⁰ = 20427529 is a prime.

It is a super-2 number, since 2×21476105² = 922446171942050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (21476107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9899 + ... + 11871.

It is an arithmetic number, because the mean of its divisors is an integer number (1847664).

Almost surely, 2^21476105 is an apocalyptic number.

It is an amenable number.

21476105 is a deficient number, since it is larger than the sum of its proper divisors (8086519).

21476105 is a wasteful number, since it uses less digits than its factorization.

21476105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 21476105 is about 4634.2318673109. The cubic root of 21476105 is about 277.9618367984.

The spelling of 21476105 in words is "twenty-one million, four hundred seventy-six thousand, one hundred five".