20153311 has 4 divisors (see below), whose sum is σ = 20168352. Its totient is φ = 20138272.

The previous prime is 20153299. The next prime is 20153321. The reversal of 20153311 is 11335102.

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

It is a cyclic number.

It is not a de Polignac number, because 20153311 - 2⁹ = 20152799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5290 + ... + 8263.

It is an arithmetic number, because the mean of its divisors is an integer number (5042088).

Almost surely, 2^20153311 is an apocalyptic number.

20153311 is a deficient number, since it is larger than the sum of its proper divisors (15041).

20153311 is a wasteful number, since it uses less digits than its factorization.

20153311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15040.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 20153311 is about 4489.2439229786. The cubic root of 20153311 is about 272.1335804009.

Adding to 20153311 its reverse (11335102), we get a palindrome (31488413).

The spelling of 20153311 in words is "twenty million, one hundred fifty-three thousand, three hundred eleven".