13020020 has 24 divisors (see below), whose sum is σ = 29445864. Its totient is φ = 4807296.

The previous prime is 13020017. The next prime is 13020037. The reversal of 13020020 is 2002031.

It can be written as a sum of positive squares in 4 ways, for example, as 1227664 + 11792356 = 1108^2 + 3434^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24779 + ... + 25298.

It is an arithmetic number, because the mean of its divisors is an integer number (1226911).

Almost surely, 2^13020020 is an apocalyptic number.

13020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13020020 is an abundant number, since it is smaller than the sum of its proper divisors (16425844).

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

13020020 is a wasteful number, since it uses less digits than its factorization.

13020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50099 (or 50097 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 13020020 is about 3608.3264819027. The cubic root of 13020020 is about 235.2541087121.

Adding to 13020020 its reverse (2002031), we get a palindrome (15022051).

The spelling of 13020020 in words is "thirteen million, twenty thousand, twenty".