13020990 has 64 divisors (see below), whose sum is σ = 33094656. Its totient is φ = 3272192.

The previous prime is 13020983. The next prime is 13020991. The reversal of 13020990 is 9902031.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13020990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13020991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77887 + ... + 78053.

It is an arithmetic number, because the mean of its divisors is an integer number (517104).

Almost surely, 2^13020990 is an apocalyptic number.

13020990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13020990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16547328).

13020990 is an abundant number, since it is smaller than the sum of its proper divisors (20073666).

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

13020990 is a wasteful number, since it uses less digits than its factorization.

13020990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 13020990 is about 3608.4608907400. The cubic root of 13020990 is about 235.2599507619.

The spelling of 13020990 in words is "thirteen million, twenty thousand, nine hundred ninety".