20407166 has 16 divisors (see below), whose sum is σ = 33339600. Its totient is φ = 9311808.

The previous prime is 20407129. The next prime is 20407181. The reversal of 20407166 is 66170402.

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, 2096 + ... + 6723.

It is an arithmetic number, because the mean of its divisors is an integer number (2083725).

Almost surely, 2^20407166 is an apocalyptic number.

20407166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20407166 is a deficient number, since it is larger than the sum of its proper divisors (12932434).

20407166 is a wasteful number, since it uses less digits than its factorization.

20407166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20407166 is about 4517.4291361348. The cubic root of 20407166 is about 273.2714318809.

Adding to 20407166 its reverse (66170402), we get a palindrome (86577568).

The spelling of 20407166 in words is "twenty million, four hundred seven thousand, one hundred sixty-six".