13020735 has 32 divisors (see below), whose sum is σ = 25643520. Its totient is φ = 5493888.

The previous prime is 13020731. The next prime is 13020751. The reversal of 13020735 is 53702031.

It is a happy number.

It is not a de Polignac number, because 13020735 - 2² = 13020731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13020731) 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, 3405 + ... + 6134.

It is an arithmetic number, because the mean of its divisors is an integer number (801360).

Almost surely, 2^13020735 is an apocalyptic number.

13020735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13020735 is a deficient number, since it is larger than the sum of its proper divisors (12622785).

13020735 is a wasteful number, since it uses less digits than its factorization.

13020735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9567.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 13020735 is about 3608.4255569431. The cubic root of 13020735 is about 235.2584149934.

Adding to 13020735 its reverse (53702031), we get a palindrome (66722766).

The spelling of 13020735 in words is "thirteen million, twenty thousand, seven hundred thirty-five".