20154166 has 8 divisors (see below), whose sum is σ = 30449160. Its totient is φ = 10004448.

The previous prime is 20154149. The next prime is 20154179. The reversal of 20154166 is 66145102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20154166.

It is a congruent number.

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, 35971 + ... + 36526.

It is an arithmetic number, because the mean of its divisors is an integer number (3806145).

Almost surely, 2^20154166 is an apocalyptic number.

20154166 is a deficient number, since it is larger than the sum of its proper divisors (10294994).

20154166 is a wasteful number, since it uses less digits than its factorization.

20154166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72638.

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

The square root of 20154166 is about 4489.3391495854. The cubic root of 20154166 is about 272.1374287499.

Adding to 20154166 its reverse (66145102), we get a palindrome (86299268).

The spelling of 20154166 in words is "twenty million, one hundred fifty-four thousand, one hundred sixty-six".