11817020 has 24 divisors (see below), whose sum is σ = 25422768. Its totient is φ = 4611200.

The previous prime is 11817019. The next prime is 11817053. The reversal of 11817020 is 2071811.

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 = 11816983 and 11817001.

It is a congruent 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, 6386 + ... + 8025.

It is an arithmetic number, because the mean of its divisors is an integer number (1059282).

Almost surely, 2^11817020 is an apocalyptic number.

11817020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11817020 is an abundant number, since it is smaller than the sum of its proper divisors (13605748).

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

11817020 is a wasteful number, since it uses less digits than its factorization.

11817020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14461 (or 14459 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 11817020 is about 3437.5892715681. The cubic root of 11817020 is about 227.7732176142.

Adding to 11817020 its reverse (2071811), we get a palindrome (13888831).

The spelling of 11817020 in words is "eleven million, eight hundred seventeen thousand, twenty".