11881020 has 24 divisors (see below), whose sum is σ = 33267024. Its totient is φ = 3168256.

The previous prime is 11881013. The next prime is 11881027. The reversal of 11881020 is 2018811.

11881020 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11881013) and next prime (11881027).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11881027) 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, 98949 + ... + 99068.

It is an arithmetic number, because the mean of its divisors is an integer number (1386126).

Almost surely, 2^11881020 is an apocalyptic number.

11881020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11881020 is an abundant number, since it is smaller than the sum of its proper divisors (21386004).

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

11881020 is a wasteful number, since it uses less digits than its factorization.

11881020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198029 (or 198027 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 11881020 is about 3446.8855507545. The cubic root of 11881020 is about 228.1836777812.

Adding to 11881020 its reverse (2018811), we get a palindrome (13899831).

The spelling of 11881020 in words is "eleven million, eight hundred eighty-one thousand, twenty".