20215366 has 8 divisors (see below), whose sum is σ = 30895344. Its totient is φ = 9916920.

The previous prime is 20215343. The next prime is 20215381. The reversal of 20215366 is 66351202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20215366² = 817322045027912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20215366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95250 + ... + 95461.

It is an arithmetic number, because the mean of its divisors is an integer number (3861918).

Almost surely, 2^20215366 is an apocalyptic number.

20215366 is a deficient number, since it is larger than the sum of its proper divisors (10679978).

20215366 is a wasteful number, since it uses less digits than its factorization.

20215366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190766.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20215366 is about 4496.1501309454. The cubic root of 20215366 is about 272.4126072756.

Adding to 20215366 its reverse (66351202), we get a palindrome (86566568).

The spelling of 20215366 in words is "twenty million, two hundred fifteen thousand, three hundred sixty-six".