20290166 has 16 divisors (see below), whose sum is σ = 32979744. Its totient is φ = 9306624.

The previous prime is 20290147. The next prime is 20290183. The reversal of 20290166 is 66109202.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2006 + ... + 6678.

It is an arithmetic number, because the mean of its divisors is an integer number (2061234).

Almost surely, 2^20290166 is an apocalyptic number.

20290166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20290166 is a deficient number, since it is larger than the sum of its proper divisors (12689578).

20290166 is a wasteful number, since it uses less digits than its factorization.

20290166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4855.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20290166 is about 4504.4606780390. The cubic root of 20290166 is about 272.7481834001.

Adding to 20290166 its reverse (66109202), we get a palindrome (86399368).

The spelling of 20290166 in words is "twenty million, two hundred ninety thousand, one hundred sixty-six".