20166530 has 8 divisors (see below), whose sum is σ = 36299772. Its totient is φ = 8066608.

The previous prime is 20166529. The next prime is 20166541. The reversal of 20166530 is 3566102.

It can be written as a sum of positive squares in 2 ways, for example, as 18757561 + 1408969 = 4331^2 + 1187^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20166496 and 20166505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1008317 + ... + 1008336.

Almost surely, 2^20166530 is an apocalyptic number.

20166530 is a deficient number, since it is larger than the sum of its proper divisors (16133242).

20166530 is a wasteful number, since it uses less digits than its factorization.

20166530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016660.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20166530 is about 4490.7159785495. The cubic root of 20166530 is about 272.1930668638.

The spelling of 20166530 in words is "twenty million, one hundred sixty-six thousand, five hundred thirty".