11655020 has 48 divisors (see below), whose sum is σ = 27518400. Its totient is φ = 4114176.

The previous prime is 11655019. The next prime is 11655023. The reversal of 11655020 is 2055611.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11654983 and 11655001.

It is not an unprimeable number, because it can be changed into a prime (11655023) 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, 5006 + ... + 6954.

It is an arithmetic number, because the mean of its divisors is an integer number (573300).

Almost surely, 2^11655020 is an apocalyptic number.

11655020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11655020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13759200).

11655020 is an abundant number, since it is smaller than the sum of its proper divisors (15863380).

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

11655020 is a wasteful number, since it uses less digits than its factorization.

11655020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994 (or 1992 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 11655020 is about 3413.9449321862. The cubic root of 11655020 is about 226.7275739821.

The spelling of 11655020 in words is "eleven million, six hundred fifty-five thousand, twenty".