12178020 has 24 divisors (see below), whose sum is σ = 34098624. Its totient is φ = 3247456.

The previous prime is 12178007. The next prime is 12178021. The reversal of 12178020 is 2087121.

12178020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12178020² = 296608342240800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12178021) 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, 101424 + ... + 101543.

It is an arithmetic number, because the mean of its divisors is an integer number (1420776).

Almost surely, 2^12178020 is an apocalyptic number.

12178020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12178020 is an abundant number, since it is smaller than the sum of its proper divisors (21920604).

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

12178020 is a wasteful number, since it uses less digits than its factorization.

12178020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202979 (or 202977 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 12178020 is about 3489.7019930074. The cubic root of 12178020 is about 230.0694182396.

The spelling of 12178020 in words is "twelve million, one hundred seventy-eight thousand, twenty".