20266355 has 8 divisors (see below), whose sum is σ = 24506064. Its totient is φ = 16088800.

The previous prime is 20266349. The next prime is 20266391. The reversal of 20266355 is 55366202.

It is a happy number.

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

It is not a de Polignac number, because 20266355 - 2¹⁸ = 20004211 is a prime.

It is a Duffinian 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, 14816 + ... + 16125.

It is an arithmetic number, because the mean of its divisors is an integer number (3063258).

Almost surely, 2^20266355 is an apocalyptic number.

20266355 is a deficient number, since it is larger than the sum of its proper divisors (4239709).

20266355 is a wasteful number, since it uses less digits than its factorization.

20266355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31077.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 20266355 is about 4501.8168554485. The cubic root of 20266355 is about 272.6414494433.

The spelling of 20266355 in words is "twenty million, two hundred sixty-six thousand, three hundred fifty-five".