20172366 has 12 divisors (see below), whose sum is σ = 43706832. Its totient is φ = 6724116.

The previous prime is 20172359. The next prime is 20172377. The reversal of 20172366 is 66327102.

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 5 ways as a sum of consecutive naturals, for example, 560326 + ... + 560361.

It is an arithmetic number, because the mean of its divisors is an integer number (3642236).

Almost surely, 2^20172366 is an apocalyptic number.

20172366 is an abundant number, since it is smaller than the sum of its proper divisors (23534466).

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

20172366 is a wasteful number, since it uses less digits than its factorization.

20172366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120695 (or 1120692 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20172366 is about 4491.3657165722. The cubic root of 20172366 is about 272.2193210174.

Adding to 20172366 its reverse (66327102), we get a palindrome (86499468).

The spelling of 20172366 in words is "twenty million, one hundred seventy-two thousand, three hundred sixty-six".