20111245 has 16 divisors (see below), whose sum is σ = 30089088. Its totient is φ = 12536640.

The previous prime is 20111243. The next prime is 20111257. The reversal of 20111245 is 54211102.

It is not a de Polignac number, because 20111245 - 2¹ = 20111243 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 (20111243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25734 + ... + 26503.

It is an arithmetic number, because the mean of its divisors is an integer number (1880568).

Almost surely, 2^20111245 is an apocalyptic number.

It is an amenable number.

20111245 is a deficient number, since it is larger than the sum of its proper divisors (9977843).

20111245 is a wasteful number, since it uses less digits than its factorization.

20111245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52260.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 20111245 is about 4484.5562768238. The cubic root of 20111245 is about 271.9441070636.

Adding to 20111245 its reverse (54211102), we get a palindrome (74322347).

The spelling of 20111245 in words is "twenty million, one hundred eleven thousand, two hundred forty-five".