20166355 has 16 divisors (see below), whose sum is σ = 27016704. Its totient is φ = 14323680.

The previous prime is 20166329. The next prime is 20166359. The reversal of 20166355 is 55366102.

It is not a de Polignac number, because 20166355 - 2⁷ = 20166227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20166359) 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, 1899 + ... + 6628.

It is an arithmetic number, because the mean of its divisors is an integer number (1688544).

Almost surely, 2^20166355 is an apocalyptic number.

20166355 is a deficient number, since it is larger than the sum of its proper divisors (6850349).

20166355 is a wasteful number, since it uses less digits than its factorization.

20166355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8586.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 20166355 is about 4490.6964938637. The cubic root of 20166355 is about 272.1922795209.

It can be divided in two parts, 20 and 166355, that added together give a cube (166375 = 55³).

The spelling of 20166355 in words is "twenty million, one hundred sixty-six thousand, three hundred fifty-five".