20262166 has 4 divisors (see below), whose sum is σ = 30393252. Its totient is φ = 10131082.

The previous prime is 20262161. The next prime is 20262167. The reversal of 20262166 is 66126202.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20262166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20262161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5065540 + ... + 5065543.

It is an arithmetic number, because the mean of its divisors is an integer number (7598313).

Almost surely, 2^20262166 is an apocalyptic number.

20262166 is a deficient number, since it is larger than the sum of its proper divisors (10131086).

20262166 is a wasteful number, since it uses less digits than its factorization.

20262166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10131085.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20262166 is about 4501.3515748051. The cubic root of 20262166 is about 272.6226634023.

Adding to 20262166 its reverse (66126202), we get a palindrome (86388368).

The spelling of 20262166 in words is "twenty million, two hundred sixty-two thousand, one hundred sixty-six".