12013020 has 36 divisors (see below), whose sum is σ = 36440040. Its totient is φ = 3203424.

The previous prime is 12013019. The next prime is 12013021. The reversal of 12013020 is 2031021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12013019) and next prime (12013021).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12012993 and 12013011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33190 + ... + 33549.

Almost surely, 2^12013020 is an apocalyptic number.

12013020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12013020 is an abundant number, since it is smaller than the sum of its proper divisors (24427020).

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

12013020 is a wasteful number, since it uses less digits than its factorization.

12013020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66754 (or 66749 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 12013020 is about 3465.9803807869. The cubic root of 12013020 is about 229.0256195792.

Adding to 12013020 its reverse (2031021), we get a palindrome (14044041).

It can be divided in two parts, 1 and 2013020, that added together give a triangular number (2013021 = T₂₀₀₆).

The spelling of 12013020 in words is "twelve million, thirteen thousand, twenty".