20015166 has 32 divisors (see below), whose sum is σ = 40884480. Its totient is φ = 6531264.

The previous prime is 20015147. The next prime is 20015173. The reversal of 20015166 is 66151002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85786 + ... + 86018.

It is an arithmetic number, because the mean of its divisors is an integer number (1277640).

Almost surely, 2^20015166 is an apocalyptic number.

20015166 is an abundant number, since it is smaller than the sum of its proper divisors (20869314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20015166 is a wasteful number, since it uses less digits than its factorization.

20015166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20015166 is about 4473.8312440234. The cubic root of 20015166 is about 271.5103557534.

Adding to 20015166 its reverse (66151002), we get a palindrome (86166168).

The spelling of 20015166 in words is "twenty million, fifteen thousand, one hundred sixty-six".