21403040166626 has 16 divisors (see below), whose sum is σ = 32128590583584. Its totient is φ = 10693512863424.

The previous prime is 21403040166623. The next prime is 21403040166643. The reversal of 21403040166626 is 62666104030412.

It is not an unprimeable number, because it can be changed into a prime (21403040166623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14142065 + ... + 15582171.

It is an arithmetic number, because the mean of its divisors is an integer number (2008036911474).

Almost surely, 2^{21403040166626} is an apocalyptic number.

21403040166626 is a deficient number, since it is larger than the sum of its proper divisors (10725550416958).

21403040166626 is a wasteful number, since it uses less digits than its factorization.

21403040166626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445665.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 21403040166626 in words is "twenty-one trillion, four hundred three billion, forty million, one hundred sixty-six thousand, six hundred twenty-six".