11365820 has 24 divisors (see below), whose sum is σ = 23931600. Its totient is φ = 4534272.

The previous prime is 11365811. The next prime is 11365829. The reversal of 11365820 is 2856311.

It is an interprime number because it is at equal distance from previous prime (11365811) and next prime (11365829).

It is a self number, because there is not a number n which added to its sum of digits gives 11365820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11365829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14396 + ... + 15164.

It is an arithmetic number, because the mean of its divisors is an integer number (997150).

Almost surely, 2^11365820 is an apocalyptic number.

11365820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11365820 is an abundant number, since it is smaller than the sum of its proper divisors (12565780).

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

11365820 is a wasteful number, since it uses less digits than its factorization.

11365820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517 (or 1515 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 11365820 is about 3371.3231823722. The cubic root of 11365820 is about 224.8365561975.

The spelling of 11365820 in words is "eleven million, three hundred sixty-five thousand, eight hundred twenty".