13020357 has 16 divisors (see below), whose sum is σ = 20303360. Its totient is φ = 7266672.

The previous prime is 13020347. The next prime is 13020361. The reversal of 13020357 is 75302031.

It is a happy number.

13020357 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13020357 - 2⁷ = 13020229 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 (13020307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6307 + ... + 8112.

It is an arithmetic number, because the mean of its divisors is an integer number (1268960).

Almost surely, 2^13020357 is an apocalyptic number.

It is an amenable number.

13020357 is a deficient number, since it is larger than the sum of its proper divisors (7283003).

13020357 is a wasteful number, since it uses less digits than its factorization.

13020357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14472.

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

The square root of 13020357 is about 3608.3731791487. The cubic root of 13020357 is about 235.2561384056.

Adding to 13020357 its reverse (75302031), we get a palindrome (88322388).

The spelling of 13020357 in words is "thirteen million, twenty thousand, three hundred fifty-seven".