11780020 has 24 divisors (see below), whose sum is σ = 28272384. Its totient is φ = 4038816.

The previous prime is 11780011. The next prime is 11780029. The reversal of 11780020 is 2008711.

It is an interprime number because it is at equal distance from previous prime (11780011) and next prime (11780029).

It is a self number, because there is not a number n which added to its sum of digits gives 11780020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11780029) 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, 41932 + ... + 42211.

It is an arithmetic number, because the mean of its divisors is an integer number (1178016).

Almost surely, 2^11780020 is an apocalyptic number.

11780020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11780020 is an abundant number, since it is smaller than the sum of its proper divisors (16492364).

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

11780020 is a wasteful number, since it uses less digits than its factorization.

11780020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84159 (or 84157 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 11780020 is about 3432.2033739276. The cubic root of 11780020 is about 227.5352439058.

Adding to 11780020 its reverse (2008711), we get a palindrome (13788731).

The spelling of 11780020 in words is "eleven million, seven hundred eighty thousand, twenty".